TFS Service Account

Question

We want to change the password of domain\TFSSERVICE and domain\TFSREPORTS.

I have found out two links :

http://msdn.microsoft.com/en-us/library/bb552178.aspx http://msdn.microsoft.com/en-us/library/bb552344.aspx

Could anybody please let me know, is there anything which needs to be taken care? Is there any possibility of complications in working of tfsprojects after password change?

Thanks up front.