Hi @Se Yeen Tan ,
Did you disable the IPv6 on the server?
If you did, try to enable it and restart the server.
If the issues still persists.
Try renaming the queue folder, and the exchange will create a new folder .
This will happen if the contents of the folder become corrupt.
Here’s the path of the folder.
C:\Program Files\Microsoft\Exchange Server\TransportRoles\data
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