Just open Manage Nodes. Tick the box for the nodes you want and then click on Maintenance Mode and select Unmanage. Do the same to remanage them.
Just to follow on. this is what the screen will look like. Tick as many as you want and then select the highlighted "unmanage now"
Thanks Guys for all your Help..
Yes, I'm aware of the above options which you provided. I feel this becomes hard for me when i have to unmanage/re-manage more 10 nodes at a time. I need to go search for them if i have 100's of nodes. So i'm looking for any other options which makes this little simpler
you may be using custom property and can identify the nodes using custom property ,from manage nodes page you can select them based on custom property and unmanage/remanage as required.
Save this as .ps1 and run it. This will use your AD credentials to authenticate to your Orion server and unmanage a node named NODEYOUWANTTOUNMANAGE for 10 minutes from now.
$swis = Connect-Swis -host YOURORIONSERVER -Trusted
$nodeid = Get-SwisData $swis "SELECT NodeID FROM Orion.Nodes WHERE SysName LIKE 'NODEYOUWANTTOUNMANAGE'"
$now =[DateTime ]:: Now
Invoke-SwisVerb $swis Orion.Nodes Unmanage @("N: $nodeid ", $now ,$later , "false")
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