Can anyone help. I have used Outlook 365 for years. Until recently I hadn't noticed Mimecast being installed. Of late I have noticed Outlook has a Mimecast tab and I keep continually get an annoying Mimecast "Your credentials could not be verified . . . " error message . As far as I am aware I do not need nor want Mimecast. I have uninstalled it twice and it just keep reappearing.
Do I need this and if so why and how to I find out my authentication credentials? It will not reload them and I have no clue as to the address / port/ username and password it appears I have to add ?
If I do not need this, how do I stop it from continually installing itself?
Thanks