Exchange 2010 Activesync
I have an issue with an Exchange server activesync sending email with attachments larger than 10MB. I have changed all of the send/receive connector and database limits to allow 100MB attachments (because that's what our smarthost allows) and I have updated the web.config file but I am still unable to send large email via activesync/oma. Attempts to send receive a message from the server that the message was rejected by the server. Is there another setting besides the web.config file that I need to update to allow large attachments? Thanks for your help!
Hello the thing is that you have to configure your transport as well not just the connectors
https://messaging.faboit.com/2016/09/exchange-connectors-to-send-and-receive.html
(you don't need to change anything on web.config).
https://messaging.faboit.com/2016/09/exchange-connectors-to-send-and-receive.html
(you don't need to change anything on web.config).
Beware increasing the attachment size for the entire organization might have also it's adverse effects.
Example: If users are sending emails with large attachments, then there is a chance the all emails might stuck up in the queue and this could lead the transport service to crash.
Default limit for attachment is 10MB, so increase the size with the adverse effects in mind.
Example: If users are sending emails with large attachments, then there is a chance the all emails might stuck up in the queue and this could lead the transport service to crash.
Default limit for attachment is 10MB, so increase the size with the adverse effects in mind.
ASKER
Transport and connectors are all set to 100MB because that is what the smarthost allows. There are no database limits for the accounts I'm using to test. The response from Xiu Zhang in this article indicates I also have to make IIS app pool changes. After updating the web.config to 100 MB (104857600 bytes) for both the maxAllowedContentLength and maxReceivedMessageSize I'm able to send 21 MB attachments but nothing over 25 or 30. Does the maxRequestLength in the web.config also have to be changed? There's a reference to that setting in this article but it isn't clear if it must be updated or not.
ASKER
Does anyone have any additional comment on this? I haven't found a solid solution to the issue.
1. did you check the transports and connectors ? are they configured as shown here?
2. Set a lower 80MB for example and check if it goes out or not.
3. if 2 has success usually a 100MB email it's bigger than 100mb. so probably if the limit is strict 100mb then you should go a lil lower.
4. show some logs?
5 provide more information about the event viewer? is the server or the smarthost the one rejecting the emails?
2. Set a lower 80MB for example and check if it goes out or not.
3. if 2 has success usually a 100MB email it's bigger than 100mb. so probably if the limit is strict 100mb then you should go a lil lower.
4. show some logs?
5 provide more information about the event viewer? is the server or the smarthost the one rejecting the emails?
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Please read "Manpreet SIngh Khatra's " comment
additional reading - https://social.technet.microsoft.com/Forums/exchange/en-US/c6ddc56e-da96-4ea2-98c5-4ff9223dac5b/exchange-2010-max-message-sizes-for-owa-ews-and-activesync?forum=exchange2010