ehlo,
Global catalog port was ignored from SRV record, hard coded value was used
every time.
1st patch should fix it.
2nd patch add fall back to LDAP if GC is not available.
with this patch SSSD will not go offline if GC is not available,
but it may happen that SSSD will try to connect to GC often.
I am not sure, but we can add new option do disable GC lookup completely.
LS