Настройка максимального размера сообщения в Exchange 2010
13.04.2012
itpro
Exchange
комментариев 8
В данной статье рассмотрим способы задания максимального размера сообщения, которое может передаваться в системе Exchange Server 2010. Отметим тот факт, что максимальный размер почтового сообщения может быть настроен на разных уровнях иерархии Exchange. Microsoft в документации рекомендует задавать одинаковый размер максимального почтового сообщения на входящих и на исходящих коннекторах. В нашем примере мы ограничим максимальный размер письма для нашей организации значением 21 МБ.
На первом этапе настроим максимальный размер для входящих/исходящих писем для всей организации Exchange в разделе Organization Configuration->Hub Transport-> Global Settings, поля называются Maximum receive/send size.
Эту же самую операцию можно выполнить с помощью Powershell :
Текущую настройку можно получить командой:
Задать новое значение:
Далее необходимо настроить ограничения для всех исходящих коннекторов. Organization Configuration ->Hub Transport-> Send Connectors. В моей конфигурации существует 4 коннектора такого типа, и ограничение необходимо задать для каждого из них.
Текущие настройки можно получить:
Задать собственные настройки можно командой:
Следующий этап настройка коннекторов для входящей почты. Найти их можно в Server Configuration->Hub Transport. Убедитесь, что вы задали настройки для всех входящих коннекторов.
То же самое с помощью Powershell:
Задать новые настройки:
Также в Exchange 2010 имеется возможность изменить максимальный размер электрического письма персонально для каждого пользователя. Для этого необходимо перейти в свойства почтового ящика и на вкладке Mail Flow Settings настроить значения параметра Message Size Restriction. Я этого делать не буду, т.к. все необходимые настройки применяются политикой верхнего уровня. Если вы хотите задать ограничение на уровне ящика для всех получателей в организации, воспользуйтесь командой:
Задать ограничение для конкретного пользователя:
Далее на всех серверах Hub Transport вручную придется изменить параметры в файле web.config (находится он в каталоге c:\Program Files\Microsoft\Exchange Server\ClientAccess\Owa\). Откроем его в текстовом редакторе, и зададим параметру maxRequestLength значение 21504:
<httpRuntime maxRequestLength=”21504” />
Сохраним изменения. После модификации файла web.config, для вступления изменений в силу, необходимо перезапустить службу “Microsoft Exchange Transport”. Отметим, что при перезапуске данной службы, ваш сервер Hub Transport на некоторое время перестанет осуществлять маршрутизацию почты (для пользователей это будет незаметно, т.к. перерыв будет незначительный).
Службу Exchange Transport можно перезапустить командой PowerShell:
Не забудьте протестировать примененные нами ограничения на максимальный размер письма, для этого попробуйте отправить письмо с вложением, превышающим 21 МБ (как создать файл определенного размера) .
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How to set mailbox/attachment/message limits in Exchange 2019
etting message and mailbox limits in Exchange 2019 isn’t easy job, there are a lot of places where the settings need to be placed. I will try to go through every setting in this guide although I cannot promise I won’t miss something. 🙂
Before we begin
When you deploy fresh Exchange 2019 you want to set mailbox size limit for your users, retention policy for the mailboxes (how far ca nyou retrieve deleted messages) message size settings and attachment size settings (message size and attachment size are two different things), also limits for mobile devices are separate story. There are also limits on how many recipients can be in one message (I won’t cover that here) so be sure you also alter that if you need to send emails to large group of people.
All of the limits we are going to set are up to you and your specific environment. I’m going to enter some values, but in the end, you can set something entirely different. Also, some values don’t make sense. You can set attachment size limit to 300MB, but then again, nobody would be able to receive email with attachment that large. Establish what your organization needs and act accordingly.
Some of these settings can be defaulted after CU update, or regular update – be sure to check limits – ActiveSync in particular, after every huge update to your Exchange!
Let’s get to work.
Mailbox Size Limits (Quotas)
This is setting you need to think about and take into account how many users you have,do you have a lot of large attachments, what is the physical space you have on your drives, what Exchange license you have (Standard license can have max 5 DBs) and so on…
You will hear some people protesting about limits and want larger mailboxes for email.
Mailbox size is double-edged sword – it is convenient to have large mailbox, but it can also be performance and reliability issue since large mailboxes don’t behave very well in these terms.
So, think about this before you act, and don’t just put unlimited mailbox size, you will regret that decision, especially when problems start.
Ok, let’s define mailbox size for all our users.
Login to Exchange Admin Center and head to servers menu.
On servers menu select databases tab – select your database – I will select DB1, and click on edit (pencil)
Under limits menu, you have few settings – issue a warning – by default it is at 1.9GB – user will get warning that mailbox is almost full (archiving mailbox is advised)
If nothing happens, sending mails will be prohibited at 2GBs and user will not be able to send/receive email at 2.3GB.
Also, here you will define retention policy for deleted emails and deleted mailboxes.
I will change these values for the sake of this guide.
I changed values to 9GB, 9.8GB and 10.6GB. Deleted items and mailboxes to 45days.
Let’s go to the recipients menu | mailboxes tab I will select a user and edit him
Under mailbox usage menu (select More options to expand) for the user Zeljko Medic you can see that values I set earlier are applied.
If you have some users that are exception to this rule, you can define custom quotas for individuals.
I will edit another user, again, go to the mailbox usage under user you selected and click on Customize the quota settings for this mailbox. For this user I selected unlimited quota. You can also define custom values (more, or less space) if you wish.
Ok, we are done with Mailbox size quotas.
Attachments and Message size
I tried to send attachment which is 23MB in size. File is bigger than the server allows…
Ok, this is a broad topic because there are lot of places where limits needs to be changed
Here are couple of commands that will show you your current limits
Remeber to change InfoAdmin in the last command for the user you wish to see limit for.
In case I miss something, here is a good reference – https://docs.microsoft.com/en-us/exchange/mail-flow/message-size-limits?view=exchserver-2019
Ok, let’s start of with organizational settings
Organizational settings
Exchange admin center | mail flow | receive connector tab | click on … (more) and select Organization transport settings
We are going through limits tab. By default you can have 500 recipients, receive and send message size of 10MB. I will change to 1200 recipients, 50MB send and receive size
Save when you are done.
Receive Connector
Exchange admin center | mail flow | receive connector tab |
I have few connectors here, and I’m going to go through all of them.
For a start I will select “Client Frontend SBEX1” and select edit button (pencil)
On general tab I’m going to change Maximum receive message size from 36MB to 50MB. Save
Now, I will not be going through other four connectors (Client Proxy, Default Frontend, Default, Outbound Proxy…) Procedure is the same, so repeat it for other four connectors (or how many you have)
I went through all and changed to 50MB
There are also some other settings for connectors (which can be done via exchange management shell\powershell, so if you need something more special like “Maximum size of all header fields…” check the Microsoft link above.
Send Connector
Exchange admin center | mail flow | send connector tab |
I have two send connectors. One is between edge and mailbox role, and that one has unlimited send message size. Other one is the one that I selected below, that one is from the edge role to the internet (in your case it may be from the mailbox role to the internet)
Select the send connector you wish to edit and select edit (pencil)
On General tab – Maximum send message size is 10MB by default, I’m going to change it to 50MB – Save
After this is done I usually like to restart Exchange server for settings to refresh.
I also close/open Outlook clients on machines…
After these settings you should be able to send large files from Outlook.
In my case, it worked.
Before we wrap up this story, let’s check one more time all the commands from the beginning of this section. In my case all is great, just as I wanted.
But!
We are not done yet, there is one more section – mobile devices (ActiveSync), Exchange Web Services and Outlook on Web
Some of these settings you may need, some you may not.
Server Limits
ActiveSync, Exchange Web Services and Outlook on Web are story for itself. You can find more details on this link – https://docs.microsoft.com/en-us/exchange/architecture/client-access/client-message-size-limits?view=exchserver-2019
I will also use link above to source some of the screenshots below
ActiveSync
This is the part I’m often asked about. You get large attachment on your Android or iPhone and you are not able to download the attachment of forward it.
Check this part every time after you update your Exchange with CU and make sure values are not reset to default settings!
This is also the example on which I’m going to show you how you can configure Exchange Web Services and Outlook on Web (of course you have different locations for EWS an Outlook on Web).
These are the locations we need to configure
Screenshot from Microsoft
Ok, let’s go step by step.
Before you go ahead and edit web.config file in these locations, make sure you copy it first somewhere else for backup
!! My Exchange is installed in – C:\Program Files\Microsoft\Exchange Server\V15\… but here I’m going to use Microsoft’s “%ExchangeInstallPath%” for that part of the path.
Client Access (frontend) (\HttpProxy\Sync\web.config)
In following path
Also we will need to edit
Ok, I’m not going to open and edit these files manually (you can do it with notepad type in Notepad into windows search, right click on it and select “Run as Administrator”. Make sure while you navigate to the locations of the files below to open files from Notepad to select All Files (.) otherwise you will not see web.config files mentioned below!)
I’m going to do all of this this through command line
Open Command Prompt on Exchange Server as Administrator and run appcmd.exe from \windows\system32\inetsrv.
Don’t forget to change 30000000 (bytes), 10240 (kilobytes) and 10240000 (bytes) to values you like!!
This is how it looks like, I moddified mine to 50MB
I also went on to open web.config files in Notepad to check if values are added – they are
Before we wrap this up, there is one more thing we need to do in IIS to check if everything is ok, because we added maxAllowedContentLength:30000000 to our web.config files
Open IIS | Sites | Default Web Site | Microsoft-Server-ActiveSync | select Configuration Editor from middle screen
On the top of the Configuration Editor click on section window.
Select system.webServer | security | requestFiltering
expand requestLimits and check maxAllowedContentLength part. Mine is in place and with the size I set it (default is 30000000)
Repeat the process in:
IIS | Sites | Exchange Back End | Microsoft-Server-ActiveSync | select Configuration Editor from middle screen
Result should be same.
Restart IIS for these settings to take place.
Before I set all this under ActiveSync I tried to send cca 30MB attachment from my iPhone. While large size attachments go without any problems from my Desktop Outlook, this was not the case from the Outlook on iOS
From iPhone I would get error “Unable to send the message: either the send quota has been exceeded; or the message was too large; or the mailbox is over-quota. Exchange ActiveSync error details: SendQuotaExceeded, Code = ‘115’.
After I did all the settings above, the message from iPhone went through without problems.
Exchange Web Services
I’m not going to repeat the process for these other services, more or less procedure is same as for ActiveSync (of course files are in different locations and there is no need for IIS check) and you can just follow the procedure here – https://docs.microsoft.com/en-us/exchange/architecture/client-access/client-message-size-limits?view=exchserver-2019
I’m just going to put quickly screenshot of file locations and values that need to be modified, and also commands you need to run in CMD on Exchange
Picture is courtesy of Microsoft, from the link above.
Open command prompt as admin and navigate to the folder described below and run following commands. If you don’t understand the concept, please look at ActiveSync example where I described everything
Outlook on the Web
I’m not going to repeat the process for these other services, more or less procedure is same as for ActiveSync (of course files are in different locations and there is no need for IIS check) and you can just follow the procedure here – https://docs.microsoft.com/en-us/exchange/architecture/client-access/client-message-size-limits?view=exchserver-2019
I’m just going to put quickly screenshot of file locations and values that need to be modified, and also commands you need to run in CMD on Exchange
Picture is courtesy of Microsoft, from the link above.
Open command prompt as admin and navigate to the folder described below and run following commands. If you don’t understand the concept, please look at ActiveSync example where I described everything
Conclusion
In this guide we went thoroughly through Exchange and set limits for mailbox size, messages size, attachment size and recipient limit.
There is really a lot to go through, so please forgive me if I forgot a detail or two. Let me know if there is something you would like to add to this.
Attachment size limit in Exchange Server
Users can’t send an attachment in Outlook Web Access. A notification shows that the files weren’t attached because it would cause the message to exceed the maximum size limit of 10 MB. Why are users getting Exchange message size limit, and what is the solution against Exchange size limit attachments? This article will show how to change and increase the Exchange attachment size limit in Exchange Server.
Table of contents
Exchange attachment size limit
A user wants to send a message from Outlook Web Access (OWA). When sending the email, a message shows up:
The following files weren’t attached because adding them would cause the message to exceed the maximum size limit of 10 MB.
This is what it looks when the user wants to send an email from the Outlook application:
This email message cannot be sent because it exceeds the 10 MB outgoing message size limit. We won’t be able to deliver this message because it’s too large.
Why do users get this notification, and what is the solution for Exchange maximum attachment size limit?
Get information attachment size limit Exchange
We will check the current Exchange message size limit in the Exchange organization. Run Exchange Management Shell as administrator. We need to run the following four commands.
1. Transport configuration
First, we will check the transport configuration max send size and max receive size. Run the Get-TransportConfig cmdlet.
2. Receive connector
The second cmdlet is to get the receive connector max message size. Run the Get-ReceiveConnector cmdlet.
3. Send connector
The third command that we will check is the send connector max message size. Run the Get-SendConnector cmdlet.
4. Mailbox
The fourth and last command to check is the user mailbox max send size and max receive size. This is the mailbox of the user that sends the message. Run the Get-Mailbox cmdlet.
Solution Exchange attachment size limit
Now that we gathered all the information, we can see that the transport configuration maximum size is:
- MaxSendSize 10 MB (10,485,760 bytes)
- MaxReceiveSize 10 MB (10,485,760) bytes)
Change attachment size limit Exchange Server
Let’s change the limit for both the message sent and the message received.
We will run the Set-TransportConfig cmdlet.
Restart Exchange Server services with PowerShell
Wait for several hours before the change will take effect. If you want the change to take effect immediately, restart the Exchange Server or restart the Exchange Server services.
Note: Because the Exchange Server has a cache for various settings, this change does not take effect immediately. You may have to wait several hours before this change is recognized by Outlook/Outlook Web Access (OWA).
Verify and test uploading attachment
Run the Get-TransportConfig cmdlet to verify the changes.
Close all browsers and sign in to OWA. Then, attach the file and verify that it works.
Restart the Outlook application. Next, attach the file and verify that it works.
The users can send attachments up to 20 MB from now on. The exchange attachment size limit is successfully fixed!
Note: Sending attachments in OWA can’t be larger than 25 MB in total. So if you set a 100 MB maximum allowed send size, you could only attach a total of 25 MB in attachment size in a single message using OWA. Use the Outlook application to send attachments and overcome the 25 MB limit in OWA after you set the maximum size limit.
Read the next part if you like to change the transport config in Exchange Admin Center.
Change attachment size limit in Exchange Admin Center
Sign in to the Exchange Admin Center (EAC) with an admin privileges account. Navigate to mail flow > receive connectors. Click the More … icon in the toolbar and click Organization transport settings.
Change Maximum receive message size (MB) and Maximum send message size (MB) to 20. Click Save.
Restart the Exchange Server services
Wait for several hours before the change will take effect. If you want the change to take effect immediately, restart the Exchange Server or restart the Exchange Server services.
Note: Because the Exchange Server has a cache for various settings, this change does not take effect immediately. You may have to wait several hours before this change is recognized by Outlook/Outlook Web Access (OWA).
Another option is to open the services console and search for Microsoft Exchange. Then, restart the services one by one.
I hope that this article helped you to fix the Exchange size limit attachments.
Conclusion
You learned how to change attachment size limit in Exchange Server. First, run the four commands in the article to check the max send size and max receive size. After that, adjust the values with Exchange Management Shell or in Exchange Admin Center. From now on, users can send attachments higher than the maximum size limit of 10 MB. You can find more information regarding this topic on Microsoft Docs.
Did you enjoy this article? You may also like to read Fix Winmail.dat attachment in Office 365. Don’t forget to follow us and share this article.
ALI TAJRAN
ALI TAJRAN is a passionate IT Architect, IT Consultant, and Microsoft Certified Trainer. He started Information Technology at a very young age, and his goal is to teach and inspire others. Read more »
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This Post Has 8 Comments
hi,
thanks for the topic, is anyone who has mailbox able to be bigger than transport service quote ?
i want to make all the users’ attachment quote (so the transport service quote) 20mb but a fews’ quote 50 mb or unlimited? is there anyway?
thx in advance
I just want to say thank you for this great website. I found a solution here on alitajran.com for my issue.
Speaking frankly, you are absolutely right.
Hi, We had a requirement to enable 40 mb as attachment. We did on global for every one. But set the exception to send only for VIP users through mail flow rules. Rest all users should be 8MB. I created the rule but normal users still can send big emails if they select multiple attachments. If they select one attachment larger that 8MB then the rule is being applied. For multiple smaller attachments even in total larger than 8MB rule is not applied.
i had the same issue with you, did you get the solution?
I’m pretty sure you only have to restart the transport service, not everything.
Only restarting the Microsoft Exchange Transport service will not work. I tested it on a clean Exchange Server 2016 and Exchange Server 2019. Restart all the Exchange services or restart the Exchange Server. That’s if you want the change immediately to take effect.
You don’t have to restart the Exchange services. Note that the Exchange server has a cache for various settings. This change does not take effect immediately. You may have to wait several hours before this change is recognized.
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Configure Email Message Size Limits for a Mailbox in Exchange 2019
In this post, we will learn the steps to configure Email Message Attachment Size Limit for a Mailbox in Exchange 2019.
Configure Message Attachment Restriction:
Exchange Server allows us to configure size restrictions to email messages sent within the service and between internal and external recipients. We can configure email attachment size as it plays an important role in bandwidth, storage limit, email queue, and mailbox size.
We can apply these limits to your entire Exchange organization, to specific mail transport connectors, specific servers, and to individual mailboxes. But in this guide, we will configure for individual mailbox only.
Find default Message Size Limit for a Mailbox:
By default mailboxes are inheriting message size limit from organizational level which we can setup using Transport Configuration Settings.
Open Exchange Management Shell.
Run below cmdlets to find the message size limit.
Get-Mailbox -Identity “Mia Turner” | fl MaxSendSize,MaxReceiveSize
Get-TransportConfig | fl MaxSendSize,MaxReceiveSize
The default message size limit for Exchange Server 2019 is 10 MB. Administrators can configure a larger message size limit for their mailbox users if required, up to a maximum of 150 MB.
Configure Email Message Size Limits for a Mailbox:
On Exchange 2019 Mailbox Server.
1. Open Internet Explorer and type https://localhost/ecp, and then press Enter. Sign in as an Administrator with the password.
2. In the Exchange Admin Center web interface, navigate to Recipients.
3. On the Mailbox tab, select the mailbox for which you want to configure message delivery restrictions and then click Edit.
4. On the mailbox properties page, click Mailbox features.
5. Under Message Size Restrictions, click View details to view and change the message size limits.
There are two types of Message Limit settings as below:
- Sent messages: To set a maximum size for messages sent by this user, select the Maximum message size (KB) checkbox and type a value in the box. The message size must be between 0 and 2,097,151 KB.
- Received messages: To set a maximum size for messages received by this user, select the Maximum message size (KB) checkbox and type a value in the box. The message size must be between 0 and 2,097,151 KB.
6. Specify the Message size limits as per your organization limit and click OK.
7. Click Save to save your changes.
Verify Message Size Limit settings for Mailbox:
8. Open Exchange Management Shell. Run below cmdlets to find the message size limit.
Get-Mailbox -Identity “Mia Turner” | fl MaxSendSize,MaxReceiveSize
We can confirm that the Send and Receive Message size limit is changed successfully.
That’s all. In this article, we have learned the steps to configure the email message size limit for a Mailbox in Exchange Server 2019.