calendar entries in outlook Version 2506 Build 16.0.18925.20076 are not synced to zimbra / carbonio

[khoebling]

With outlook Version 2506 Build 16.0.18925.20076

• When an calendar entry is created in outlook it wont get synced to zimbra / carbonio.
• A calendar entry generated via webinterface is synced into outlook
• Changes made to an existing entry via outlook are not reflected back to zimbra / carbonio

With outlook Version 2312 Build 16.0.17126.20132
everthing works as excpected in every direction to zimbra/carbonio

z-push version tested 2.5.1(zimbra) and 2.7.3(carbonio)

[khoebling]

Version 16.0.17328.20142 seems also broken
Version 16.0.19029.20136 seems also broken

[nevionix]

I can confirm this also occurs with other calendar servers:

• Nextcloud
• Baikal/Sabre