

Thank you for your reply @JoslPVG, but we running V16.0.9. Can I still check?If you are on V18 you can check the Audit logs for it and see if it gets stated and by whom.
No, not without a restore and lost of everything else. Or do a new backup, restore the old backup, backup contacts to csv and restore back the formerly created backup - a nogo as you said.Can I somehow pull the contact from the backup?
thanks for the information @fx-bastlerNo, not without a restore and lost of everything else. Or do a new backup, restore the old backup, backup contacts to csv and restore back the formerly created backup - a nogo as you said.
Build a new CSV import file by hand or build a macro which does it for you if that happens more often.
V16 has no Audit log sadly , and just to mention V16 is coming to its end of life , maybe if you upgrade the issue will be resolved.Thank you for your reply @JoslPVG, but we running V16.0.9. Can I still check?
If yes, please tell how(include steps).
Thnaks for you help once again
When you check the backup, is that a backup that was taken before the contacts disappeared? Are you saying that ALL of your backups, even ones you take now, have ALL of the previous contacts in there?I do 3cx backups every day and I check the .xml file in the backup, and search "<PhoneBookEntry>", they do exist.
When you upgrade from v16 to v18, which is inevitable, you'll have some downtime (as this is the easiest option). When this happens, you could restore the backup in v16, then do the upgrade and from the moment v18 is online you'll have an audit log option present:I don’t want to restore the backup file because that’s going to cause downtime on the 3cx phone.
We can’t do this because we are a 24/7 monitoring company, we can’t have phones not operating.

The backup is before the contacts disappeared. I had a old contact CSV file which i have now imported back to 3cx.Hi @HSM IT,
When you check the backup, is that a backup that was taken before the contacts disappeared? Are you saying that ALL of your backups, even ones you take now, have ALL of the previous contacts in there?
Thanks, I will upgrade 3cx soon.When you upgrade from v16 to v18, which is inevitable, you'll have some downtime (as this is the easiest option). When this happens, you could restore the backup in v16, then do the upgrade and from the moment v18 is online you'll have an audit log option present:
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