Whenever I try to open an email file, specifically when it has been put on a shared drive, I get an error message: “Either there is no default mail client or the current mail client cannot fulfill the messaging request. Please run Microsoft Outlook and set it as the default mail client”.

The issue is, I have set Outlook as the default mail client everywhere. I’ve gone into the Outlook settings, and set it there, I’ve changed the default applications setting to Outlook, I’ve reinstalled Office, repaired Office, changed the defaults to something else and back, but I still get this error. I cannot for the life of me figure out what the problem is.

Askify Moderator Edited question May 5, 2023