Microsoft Office Tutorials and References
In Depth Information
Remediating the UPN suffix
2. Right-click Active Directory Domain and Trusts and select Properties, as shown in
Figure 3-15 Accessing the properties of the AD UPN.
3. On the UPN Suffixes tab, enter the domain name you associated with Office 365
and click Add. Do not type @ before the UPN suffix because it will be added
automatically. For example, to add adatum.com as an alternate UPN suffix, type
adatum.com and not @adatum.com, as shown in Figure 3-16.