Seeing Replication - Subscription Expiration alarm warnings after installing version 12.1 (4299505)

WORKAROUND:
Default Alarm thresholds are set to 24 hours or less. Adjust alarm thresholds:

1. Select Configure | Alarms option
2. Select the connection name from the Connection drop down list
3. Scroll down to "Replication - Subscription Expiration" alarm
4. Uncheck Factory Setting checkbox
5. Increase the Infomational and Low severity thresholds and hit OK

Spotlight uses sp_replmonitorhelpsubscription store procedure to obtain the expiring subscriptions. 

See below MS articles on how to rectify this issue in your replication instance:
https://docs.microsoft.com/en-us/sql/relational-databases/system-stored-procedures/sp-replmonitorhelppublication-transact-sql
https://docs.microsoft.com/en-us/sql/relational-databases/replication/subscription-expiration-and-deactivation
https://docs.microsoft.com/en-us/sql/relational-databases/replication/publish/set-the-expiration-period-for-subscriptions