In 2021 Microsoft introduced a security and compliance add-on license for front line workers. 

Information regarding the add-on may be found here:

https://www.microsoft.com/en-us/licensing/news/new_f5_security_and_compliance_offer_for_frontline_workers

In GCC tenants when administrators attempt to assign this license to users an error maybe encountered.

"This user won't be able to have license assigned because you need to assign more additional services. Please re-assign license in this user's property page."

When the F5 Security and Compliance add-on was released to GCC the Exchange Online Archiving component was incorrectly included. The plan originally included was for non-GCC tenants. To correct this issue the correct Exchange Online Archiving for Government plan was introduced into the F5 Security + Compliance sku. When pulling the sku properties and reviewing plans the following may be noted:

When selecting the entire license to be applied to the user both the Exchange Online Archiving and Exchange Online Archiving for Government plans are automatically selected. It is the attempt to apply the Exchange Online Archiving plan that causes the license assignment to fail.

To assign the license administrators must manually unselect the plan Exchange Online Archiving leaving only the Exchange Online Archiving for Government selected.