Clearing the DirXML-DriverStorage Attribute.
The dirxml-DriverStorage attribute is a "per-replica" attribute. So you must delete it on the replica server associated with the driverset. To accomplish this, while launching the Generic LDAP browser or iManager, instead of providing the treename during authentication, provide the IP address of the server associated with the driverset in the tree name field. This allows you to delete the attribute from the replica server associated with the driverset.
NOTE:A new marker will be created post upgrade driver starts, since it uses a different API to connect to Azure. This information is stored in the attribute DirXML-DriverStorage. For this reason, the driver won't be able to capture events while the driver is being updated.
Start the Driver.
If you have not taken downtime as mentioned earlier then, it is mandatory to migrate the Users and Groups into Identity Vault to ensure that no changes in Azure are lost.