Taomyn

Same is happening with "buster" Get:4 http://ftp.au.debian.org/debian buster InRelease [122 kB] Err:4 http://ftp.au.debian.org/debian buster InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 04EE7237B7D453EC NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY DCC9EFBF77E11517 W: GPG error: http://ftp.au.debian.org/debian buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 04EE7237B7D453EC NO_PUBKEY...

I don't know if this helps, but because I decided to rebuild my Google calendar that I use for syncing (I saw there were some replicated entries from the past), I noticed that any Outlook recurring appointments where I had cancelled a few single occurrences, were correctly replicated to Google calendar.

Let me know how I can help further, or test any changes

Declining single occurrence of multi-occurrence calendar entry does not sync to Google Calendar

Google Calendar API: Daily Limit Exceeded.