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The carddav address book is not syncing.

Thunderbird Contacts
mr. Bo
mr. Bo

Thunderbird is used on a domain network of 100 computers, all connected to a Carddav address book. About 10 computers have stopped syncing their address book. Reconnecting the address book doesn't help. Newly added email addresses don't sync. Everything is fine on the other computers, all running Windows 10.

Thunderbird is used on a domain network of 100 computers, all connected to a Carddav address book. About 10 computers have stopped syncing their address book. Reconnecting the address book doesn't help. Newly added email addresses don't sync. Everything is fine on the other computers, all running Windows 10.

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