Hi all,
I am having a problem where our TMG array will intermittently alert through SCOM that the LDAP servers have failed to respond. We have 2 TMG servers running 2010 SP2 RU1, and each will occasionally flag an event 21286 that it could not contact the DC. However, all functionality appears to be fine.
I have followed all the suggested steps for resolution in the SCOM alert and everything is already in order. I have also confirmed that all is set up according to this guide: http://blogs.technet.com/b/keithab/archive/2013/05/01/3483834.aspx The LDP utility allows me to connect to the DC mentioned in the alert without any problems, and yet we still get these alerts.
Any advice on how to get to the root of this would be much appreciated! Failing that, if this is a "false" alert since everything appears to be working fine, is it safe to override the alert in SCOM?
Many thanks!
G