I know I can put an email in my own calendar but I try to take individuals out of the equation where possible (what happens when I leave the company!). As an example, I used to use ‘On_Call Rosters’ in email notification pipeline blocks but then I had to constantly edit myself in the gateway when people wanted to edit members. I switched to using a calculated roster type that emails an outlook email contact group (managed by IT). Now I simply request new contact groups and forward member edit requests to IT.
The Gateway → Web Server → Certificate Details has the information I want, it even has a warning on that screen if it is to expire ‘soon’. I think I will submit an idea to IA to perhaps have the ‘Not Valid After’ date as a system tag so we can do what we want with it.