I'm sorry this isn't a real problem, just a feedback but I couldn't find the correct Project/Issue at the menu.

The mssql.agent2 template (https://www.zabbix.com/integrations/mssql#mssql_agent2) contain an error about the "Page life expectancy is low" trigger.
Trigger's event name is 

MSSQL: Page life expectancy is low (less {$MSSQL.PAGE_LIFE_EXPECTANCY.MIN}min for 15m)

 actually the PLE is defined in seconds (as defined in MS documentation) and not minutes. Sill the trigger is acting as expected.

Both the macro and the name should be updated.

MSSQL: Page life expectancy is low (less {$MSSQL.PAGE_LIFE_EXPECTANCY.SEC}sec for 15m)

Regards