Using Classic Outlook on Windows for personal email, calendar, and contact management
I have deleted and re-added the Outlook ICS link to my Google calendar multiple times with the same result. It will complete an initial sync but will not capture any updates.
Exactly, and this is the root of the issue reported.
I'm still using the 3rd party 'Outlook Google Calendar Sync' app which works flawlessly but as others have said, why it requires a 3rd party app is beyond me. Surely Google & M$ should be able to talk to each other!