Good morning

Toolbox unexpectedly stopped working with the error:
Unhandled Exception in Managed Code Snap-in

FX: {714FA079-DC14-470f-851C-B7EAAA4177C1}

I installed the CU8 and all Windows updates, but not work.
What could have happened?
Thank you

Hi Marco

Just check if the windows firewall is enabled on the server for Admin profile.If its enabled turn off the windows firewall and check.

From which server you are trying to open this mailbox or CAS ?

Also by default the right is open for the user who installed exchange 

After that you have to manage in the new exchange group in you AD