1922350 - contacts not found and disappear on zoho

Status: UNCONFIRMED

(Thunderbird :: Address Book, defect)

Description

[Alan MacLeod]

Steps to reproduce:

Add Zoho addressbook using CardDAV either at account setup or later directly in the addressbook. Zoho account uses a private domain name.

After the initial sync, no contacts appear - so I created one in Thunderbird, then modified it in Zoho's addressbook.

Actual results:

Addressbook is added, but no contacts are downloaded - there are 770 on the server, but the Thunderbird addressbook is empty.

When I manually add a new address in Thunderbird, it shows up in both Zoho and Thunderbird.

If I edit the contact in Zoho (for example add a second email address), the contact disappears from Thunderbird at the next resync - the relevant vcards are:

Contact created in Thunderbird and exported from Thunderbird

BEGIN:VCARD
VERSION:3.0
X-ZCONTACT-ID:777210000000101001
X-UPDATED-TIME:1727878557560
REV:20241002T141557Z
UID:2d376fd8-46cc-45b2-9c47-66fe59db9899
FN:Thunderbird Contact
NICKNAME:
N:Contact;Thunderbird;;;
EMAIL;TYPE=pref,internet:[e-mail]
TEL;TYPE=cell:987 654 3210
PRODID:ez-vcard 0.9.5
END:VCARD

Same contact exported from Zoho unmodified

BEGIN:VCARD
VERSION:3.0
UID:2d376fd8-46cc-45b2-9c47-66fe59db9899
X-CONTACT-STATUS:ADDED
FN:Thunderbird Contact
NICKNAME:
N:Contact;Thunderbird;;;
EMAIL;TYPE=pref,internet:[e-mail]
TEL;TYPE=cell:987 654 3210
PRODID:ez-vcard 0.9.5
END:VCARD

Contact modified in Zoho and exported - the disappears from Thunderbird, and the addressbook is now empty

BEGIN:VCARD
VERSION:3.0
UID:2d376fd8-46cc-45b2-9c47-66fe59db9899
X-CONTACT-STATUS:ADDED
FN:Thunderbird  Contact
NICKNAME:
N:Contact;Thunderbird;;;
EMAIL;TYPE=internet:[e-mail]
EMAIL;TYPE=pref,internet:[e-mail]
TEL;TYPE=cell:987 654 3210
PRODID:ez-vcard 0.9.5
END:VCARD

Expected results:

Thunderbird should have downloaded all 770 contacts from the Zoho Addressbook. Contacts modified in Zoho should not disappear from the Thunderbird addressbook.