Users receive "Incomplete Logon Data" error when refreshing SSO BW Unv's

Question

I am receiving an 'Incomplete Logon Data' error for users who try to refresh reports using SSO based universe data connections to BW.
The users login to Infoview with WinAD (SSO through Vintella). Their BW alias is already mapped in through the automatically import user function in the SAP Authentication menu in CMC.
Using the sncgss32.dll for the SNC Library path on the BOE side. BW is using the gx64ntlm.dll.
SNC is set and working for the entitlment user and can import roles.
This issue only affects users that have never logged into Infoview with their SAP credentials. Once a user logs into BO with the SAP/BW credentials, its like the alias gets updated and works correctly from that point forward.
It seems to affect only the synched/imported alias. What am I missing?

Answer 1

Yes. They exist in both the BW and AD.  In CMC they alias's link perfectly.  They login through WinAD Kerberos SSO.  The fact that they have a BW alias allow them to navigae to the SAP/2.0 folder structure to open the webi reports.  When they refresh, the report, they get a 'Incompete logon data WIS 10901' message.
If the user logs into Infoview with their SAP credentials.  Then immediately logs out and logs back in with SSO/Kerb, the issue is resolved going forward.  Meaning this user will never see the issue again.  Unless I delete the BW alias from their ID and reintroduce the alias from the BW synch (import users)