I am posting this in case anyone runs into similar issues that I did, this may save you a lot of grief:
1. Your NetBIOS domain name contains an ampersand "
" character. (e.g. AT&T)
2. You've tried to run any Microsoft installation…
This video shows how to quickly and easily deploy an email signature for all users in Office 365 and prevent it from being added to replies and forwards. (the resulting signature is applied on the server level in Exchange Online)
The email signat…