Continue to analyse my issue, both Activesync BlueMail or Gmail is working with DigiCal calendar, the issue is with the Google Agenda app.
ICS receive by an attendee from a DigiCal app :
BEGIN:VCALENDAR
METHOD:REQUEST
PRODID:AndroidEmail
VERSION:2.0
BEGIN:VEVENT
UID:f58a2910-6043-4941-857b-d6b8acac5d4e
DTSTAMP:20220204T081653Z
DTSTART:20220204T083000Z
DTEND:20220204T093000Z
SUMMARY:Test digical
DESCRIPTIONđate : 4 fĂ©vr. 2022 09:30:00\nâ\n
X-MICROSOFT-CDO-ALLDAYEVENT:FALSE
ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN="":MAILTO:attendee@gmail.com
ORGANIZER;CN="":MAILTO:organizer@mydomain.xyz
CLASSđUBLIC
STATUS:CONFIRMED
TRANSPđźPAQUE
PRIORITY:5
SEQUENCE:0
END:VEVENT
END:VCALENDAR
ICS receive by an attendee from Google Agenda App :
BEGIN:VCALENDAR
METHOD:REQUEST
PRODID:AndroidEmail
VERSION:2.0
BEGIN:VEVENT
UID:9daa5a11-23c5-4b96-a644-654d2f4924b2
DTSTAMP:20220204T081343Z
DTSTART:20220204T120000Z
DTEND:20220204T130000Z
SUMMARY:Test
DESCRIPTIONđate : 4 fĂ©vr. 2022 13:00:00
X-MICROSOFT-CDO-ALLDAYEVENT:FALSE
ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN="":MAILTO:attendee@gmail.com
ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN=âorganizer@mydomain.xyzâ:MAILTO:organizer@mydomain.xyz
CLASSđUBLIC
STATUS:CONFIRMED
TRANSPđźPAQUE
PRIORITY:5
SEQUENCE:0
END:VEVENT
END:VCALENDAR
As you can see Google Agenda switch me as an attendee instead of the organizer. Why, I donât know, does someone using Mailcow with Google Agenda can confirm that he have or not the issue ?