When a new email arrives in a shared mailbox error status 404

[GoGorilla]

I have seen other posts about this from a few years back but the resolutions did not work for me.  Please help!  I am receiving a 404 status with error The specified object was not found in the store...I am a global admin, I changed my connection, removed the semi-colon from the mailbox name and I still am receiving the error.  It goes away then comes back.  I hate that I am seeing from others with this issue that it automagically started working...not good.

[GoGorilla · Accepted solution]

We added the global admin user to the shared mailbox yesterday and it started working this morning.