Are you aware of a maximum duration for which we can issue a node locked license? Is there any limit or no limit at all?
If by node-locked license you mean a license checked out from the License Management Tool, then the maximum duration is defined as the lesser of the following:
The maximum checkout duration specified on the Site Settings page of the SELECTserver administration site, which is typically 365 days
The expiration date of the license on the SELECTserver license file as shown on the View License File page of the SELECTserver administration site
Managing License issue
Non Select / Node Lock users