BPOS Sign-in tool won’t sign in: The Client was unable to establish a secure connection with the server

You get this funny messgae when you try to sign in to BPOS, even when you know for a fact you entered your credentials correctly.
There are no errors logged in the event viewer and you get this on your Sign-in tool:

Oh, hang on. Is this a new Computer? If it is, even if its not – check your time settings – If your clock is set to a different date or an incorrect time zone – BPOS will not let you sign in.

To fix this – Make sure your date, time and time zone are correct.

BPOS AD Sync error

When you try to sync AD to MSOL with Active Directory Syncronization Tool, you get the following errors in Event Viewer:

Event Type: Error
Event Source: Directory Synchronization
Event Category: None
Event ID: 0
Date: 15/12/2010
Time: 17:40:41
User: N/A
Computer: SRV-01
Description:
Exception has been thrown by the target of an invocation.

Event Type: Error
Event Source: Directory Synchronization
Event Category: None
Event ID: 0
Date: 15/12/2010
Time: 17:40:41
User: N/A
Computer: SRV-01
Description:
Set-CoexistenceConfiguration was unable to modify the source properties. See the event logs for more detailed information.

Additionaly, you see the following error in the Dirrectory Syncronization Tool:

Considering you installed everything right and your user is a member of the Enterprise Admins group (And the Local MIIS Admins group), Make sure your user is in the default “Users” container in AD. Otherwise it won’t work…