Can't login to portal via AD account

Can't login to portal via AD account

Hello. 
From yesterday I have a issue with our instance of SDP.
We have two technician which are using AD account, and from yesterday I can't login. Wrong User name or password.
our version is quite old 11,2 but is enough for us. We converted local build administrator account because occupied license and no there is no local account. Is it possible to remove one current technician and recover local account.
What is weird from outside server for half day I had possibility to login, using FQDN URL but not worked via ip address. On server worked via localhost:xxxx but via ip.  this start happened when we installed assetexplorer on this server because we want to switch to this software. But access to SDP is needed to export assets from SDP and import to AE

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