Please use the following steps on The message exceeds the maximum supported size. Cannot save changes made to an item to store (MS Exchange mail level restore).
Symptom:
When performing an MS Exchange 2013 / 2016 / 2019 mail level (EWS backup set) restore, the following error is displayed:
[erro][Restorer.run] Path=C:\Program Files\AhsayOBM\bin\Microsoft Exchange\Mailboxes\JoeB@ahsay.com\Inbox\bugfixes\AAMkADUxNjhkODg1LWFlNDQtNDljNS1iNTMzLTQ3N2Q5YjRlZGVhNwBGAAAAAAA tQ%2B7WX6hwQptsGViTE4fABwA%2BwxyUxB%2BwRJavUCIvAGz4AAA4PiD%2BAADlBtLq%2F4Throwable= [N] [ServiceException] Message = The message exceeds the maximum supported size., Cannot save changes made to an item to store., response code = ErrorMessageSizeExceeded
Cause:
This issue can occur on an MS Exchange server if message size limits have not been setup correctly. The default message size settings are usually 30MB.
Resolution:
To resolve this issue, update the message size limits on the affected MS Exchange server:
- Login to the MS Exchange Server.
- Open Exchange Management Shell.
- Run the following cmdlet to increase the message size limits to 150MB.
>Set-TransportConfig -MaxReceiveSize 150MB -MaxSendSize 150MB
>Get-SendConnector | Set-SendConnector -MaxMessageSize 150MB
>Get-ReceiveConnector | Set-ReceiveConnector -MaxMessageSize 150MB
>Get-Mailbox | Set-Mailbox -MaxSendSize 150MB -MaxReceiveSize 150MB
For details, refer to the following Microsoft document:
https://docs.microsoft.com/en-us/exchange/configure-client-specific-message-size-limits-exchange-2013-help?redirectedfrom=MSDN