Exchange 2016 ECP Mailbox details error 500

Question

Hello,

We upgraded recently our Exchange 2016 servers from CU19 to CU20.
When we are trying to allow a mobile device via ECP 'Recipient' 'View Details', we are having an error 500, and sometime a 'HttpException (0x80004005): Request timed out'.
But it does not occur for all users, I tested around 10 users, and I'm facing the issue for only 1. I thought that mayb this user is having too many devices allowed (15), so the request is taking time, and end failing.
When I try via Exchange management shell (get-MobileDeviceStatistic), it is responding, but it's very slow.

Any idea why please?

Thank you in advance.

Regards,

Answer 1

Hi @Chriskw29

Please try increasing timeout for ECP to resolve your issue above.

PLease Launch Command Prompt using Elevated Mode and ran the following commands:

C:\windows\system32\Inetsrv\
Appcmd add backup "BackupTimeOut"
Appcmd set config "Default Web Site/ecp" -section:httpRuntime -executionTimeout:2400
Appcmd set config "Exchange Back End/ecp" -section:httpRuntime -executionTimeout:2400

Like the discussion in this similar thread: Exchange 2013 Request timeout when trying to edit Distribution group

Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

If that does not work your server is most likely overloaded and needs to have more resources allocated to the VM.
Check for Mailbox Database corruption errors in the event logs on the Exchange server

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Answer 2

The timeout change is just a workaround. It is not a fix. I have the same issue with one user that @ChrisKW29 was having. It is one user and the view details screen may timeout and it may not. But it always takes minutes when it works. But the same thin is happening on his phone. He sometimes gets his emails and sometimes it times out. I have reduced the size of his inbox. I have noticed his mailbox is a little crowed at the root level. IOW he has all of his sub folders under the email address in outlook. Instead of in the actual Inbox folder. The Email address level should only have inbox, sent, delete etc?

Could this be the issue or is there any fix for this yet.