TFS 2010 Gated Checkin - TF14098: Access Denied: User xxx needs Checkin, CheckinOther permission(s)

If you have enabled Gated Checkin on your souce tree, you would have seen the following properties in the build alert email:

• Checked in on behalf of
• Checked in by

The value for "Checked in by" is the account under which the build agent is running. The value for "Checked in on behalf of" is the user who actually checked in the changes which triggered the Gated Checkin.

If you recieve this below error during gated checkin:
TF14098: Access Denied: User xxx needs Checkin, CheckinOther permission(s) for $/TeamProject/xxx/abc.cs.

The reason is that the build agent account doesn't have permission on your source tree to checkin other user's changes

TFS 2010 Gated Checkin - Reconcile workspace after reboot

Normally when you checkin your changes with Gated Checkin enabled, once the files are checked in you see a "Team Foundation Build Notification" pop up to reconcile the workspace.
However, condiser you checkin something at the end of the day and go home thinking that you will reconcile the next day. In the mean time, your system got rebooted or went outside of network. The next day when you login to your system, you dont see the "Team Foundation Build Notification" pop up to reconcile the workspace.
You dont have to wait for the pop-up and can do the following:

• Open the Build result of your Gated Checkin by double clicking on the Gated Checkin Build Definition in Team Explorer->Team Project->Builds
• Click Reconcile Workspace