Update prerequisites.md

Added one more prerequisite that the the location of Azure tenant and SCCM SCP server should be the same

Author: msbemba

memdocs/configmgr/tenant-attach/prerequisites.md

@@ -40,6 +40,8 @@ Microsoft Endpoint Manager is an integrated solution for managing all of your de
   - Tenant sync to Intune
   - Device sync to Intune
   - Device actions in the Microsoft Endpoint Manager admin center
+ 
+- In microsoft Multi-Geo tenants, the Geo location of the Azure tenant and the SCCM service connection point should be the same. 
 
 - At least one Intune license for you as the administrator to access the Microsoft Endpoint Manager admin center. <!--10254915-->