Forum Discussion
Exchange 2019 ActiveSync + Mobile Outlook App stop syncing
Good day! We have a local installation of Exchange 2019. Services are published through the IIS ARR reverse proxy. Everything works correctly, including OWA and the Outlook desktop client. But, at ...
Today I received a delivery failure report message with the following text:
We couldn't deliver your message.
Original message details
Created date: 4/21/2023 8:48:02 AM
Sender address: ***
Recipient addresses: ***
Subject: 112
Technical details
MessageDeliveryFailedException: Could not deliver the message [len=70, data=00000000DD3CD10BD698F34E895B24A4A45F42C307008C4F2B6D3011F140B2561F956CC3D7CB00000000010F00008C4F2B6D3011F140B2561F956CC3D7CB0000000098C90000] sent at 4/21/2023 8:48:39 AM.
Failure code: 804f
Is there no information about code 804f
Any suggestions, please?
We couldn't deliver your message.
Original message details
Created date: 4/21/2023 8:48:02 AM
Sender address: ***
Recipient addresses: ***
Subject: 112
Technical details
MessageDeliveryFailedException: Could not deliver the message [len=70, data=00000000DD3CD10BD698F34E895B24A4A45F42C307008C4F2B6D3011F140B2561F956CC3D7CB00000000010F00008C4F2B6D3011F140B2561F956CC3D7CB0000000098C90000] sent at 4/21/2023 8:48:39 AM.
Failure code: 804f
Is there no information about code 804f
Any suggestions, please?
