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how can I share address books between two computers?

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I have two computers (one at home and one at work) running Thunderbird (of course). I need an address book into which I can put certain addresses because I sometimes add addresses to it at home or at work. I use a sync program called Resilio Sync (an amazing program), which would allow me to synchronise the file which holds the addresses, but I cannot find this file anywhere in Thunderbird. Can you help? Thank you, Cbergs

I have two computers (one at home and one at work) running Thunderbird (of course). I need an address book into which I can put certain addresses because I sometimes add addresses to it at home or at work. I use a sync program called Resilio Sync (an amazing program), which would allow me to synchronise the file which holds the addresses, but I cannot find this file anywhere in Thunderbird. Can you help? Thank you, Cbergs

Chosen solution

It may not be as simple as you imagine.

There are two default files, abook.mab and history.mab, representing, respectively, Personal Address Book and Collected Addresses. If those two are all you are using then you can probably port these two files back and forth. If you have other, user-defined, address books then copying them back and forth will run into trouble, mainly because you don't have control over which filenames are used for which address books.

I use two methods:

1) Google Contacts, so all my Thunderbirds and Android devices sync to a common cloud-based address book. A downside, apart from the fact that Google is involved, is that the Google and Thunderbird address book formats are slightly but significantly different.

2) Shared address book .mab files stored on Dropbox, and synchronized via an add-on: https://www.ggbs.de/extensions/AddressbooksSynchronizer.html This is fine between installations of Thunderbird. I'd also add that in my case, all the computers that use this share are located in different places and the chance of two or more trying to access Dropbox concurrently is infinitesimal. I don't know how smart Dropbox is if two different computers try to access or change one file at the same time.

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Chosen Solution

It may not be as simple as you imagine.

There are two default files, abook.mab and history.mab, representing, respectively, Personal Address Book and Collected Addresses. If those two are all you are using then you can probably port these two files back and forth. If you have other, user-defined, address books then copying them back and forth will run into trouble, mainly because you don't have control over which filenames are used for which address books.

I use two methods:

1) Google Contacts, so all my Thunderbirds and Android devices sync to a common cloud-based address book. A downside, apart from the fact that Google is involved, is that the Google and Thunderbird address book formats are slightly but significantly different.

2) Shared address book .mab files stored on Dropbox, and synchronized via an add-on: https://www.ggbs.de/extensions/AddressbooksSynchronizer.html This is fine between installations of Thunderbird. I'd also add that in my case, all the computers that use this share are located in different places and the chance of two or more trying to access Dropbox concurrently is infinitesimal. I don't know how smart Dropbox is if two different computers try to access or change one file at the same time.