During the maintenance window the existing VPN connection will remain stable. However next time you launch Global Protect(GP) client from your remote device you will be prompted to upgrade (download/install) GP client. You have the option of accepting and installing the new version, which is recommended. If you do not opt to upgrade the client it will continue to work.
We do not expect any disruptions to other services.
If you experience any issues after the update please either send a message to firstname.lastname@example.org or open a YConnect IT Incident at https://www.york.cuny.edu/it/e-forms/itts