Automating a Node to Unmanaged

Would probably have to write some custom scripts for this. I'm most comfortable in python and think you could set up a schedule to run the below once a day with some modifications

orionsdk-python/unmanage_node.py at master · solarwinds/orionsdk-python · GitHub

EDIT:
Might want to check this but here is a SWQL query that you could use to replace the example in the script above

#Only want the NodeID, Caption for the script just added the other stuff to help make it more obvious to what it is doing.
SELECT TOP 1000 NodeID, Caption, Status, StatusIcon, LastSystemUpTimePollUtc, GETUTCDATE() - 45 as checkWhere

FROM Orion.Nodes

where lastSystemUpTimePollUTC <= GETUTCDATE() - 45 and status = 2

order by lastSystemUpTimePollUTC desc

so instead of
results = swis.query('SELECT NodeID, Caption FROM Orion.Nodes WHERE IPAddress = @ip_addr', ip_addr='127.0.0.1')

you could put

results = swis.query('SELECT NodeID, Caption FROM Orion.Nodes where lastSystemUpTimePollUTC <= GETUTCDATE() - 45 and status = 2 order by lastSystemUpTimePollUTC desc)

This change could return more than one Node so you would need to create a way to loop through the results instead of just if results['results']

you would want

if results['results']:

     #loop through results and the swis.invoke here