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Kirill's avatar
Kirill
Copper Contributor
Mar 17, 2021

Exchange 2019 EWS problem sending attachments


When trying to send a excel file about 2MB via EWS (Exchange 2019 CU 8), we get an error:
"Microsoft.Exchange.WebServices.Data.ServiceResponseException: The operation can't be performed because the item is out of date. Reload the item and try again."
If file less than 2Mb, we don't get this error.
If migrate the mailbox to Exchange 2013, the problem does not reproduce.
In both cases the CAS server is Exchange 2019.

What could be the problem?

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