Option to return autodiscover LegacyDN

[rodrigues8]

Hello, first I would like to thank you for lib which is a great job. I would like to provide a recommendation, I work at an email provider and am developing something to look for legacydn accounts to update at another provider. But the autodiscover option does not have a feature today that returns this information. Looking a lot in lib I identified that there is a private function in autodiscover.py called _get_response inside the content of the variable r that is returned can already find the legacy.

thanks for everything

[ecederstrand]

Thanks for the suggestion! I'm rewriting the autodiscover logic currently, but progress is slow. I'll take the LegacyDN value into account.

In general, I think it's time that we handle all autodiscover attributes that are returned. #636 also requires some autodiscover values that we don't currently support.

More details of legacy DN here: https://www.enowsoftware.com/solutions-engine/bid/151745/The-Attribute-the-Myth-the-legacyExchangeDN

[rodrigues8]

First thank you very much for the reply! Yesterday I was continuing my legacyDN search project and came up with a new suggestion, currently in lib it is not possible to add a default config for the "discover ()" function, if it had this option would be interesting because imagine the following case:

A client has migrated from one provider to another but has forgotten to fetch legacysDN and has already changed its DNS entries, with a config created along with legacy provider information would already be able to fetch autodiscover information (including legacyDN).

Thank you for your attention!

[ecederstrand]

I don't think I can implement this properly with short notice, but you should be able to at least hack _parse_response() to parse this part of the autodiscover response and pull out what you want.

[ecederstrand]

This should be possible now. The full autodiscover response message is now available on the Account object as account.ad_response, and discover() will now return an ad_response object. The LegacyDN field is available as ad_response.user.legacy_dn.