User not showing up in OpenFire group

I'm on OpenFire 3.7 using external postgres database and LDAP/AD integration on Linux build.

1 single user in my TechGroup is not showing up under Groups in OpenFire admin console.

My TechGroup in AD contains 40 members including him. However, under Groups in OpenFire it is showing 39.

When I add a new user. AD contains 41 members and under Groups in OpenFire it is showing 40.

For some strange reason, OpenFire is not syncing over ONLY his account.

I deleted his account from Active Directory and recreated it and readd him back in the TechGroup in AD. Same result.

I rebuilt a secondary OpenFire server and he does show up correctly.

I cleared the User and Roster cache still same result on the primary OpenFire server.

Why is OpenFire not syncing just his account? Is there a way to clear his account out of the database even though it is AD integrated?

Any help will be appreciated! Thanks.