oauth2 passdb user authentication with PLAIN

[Simon]

On 05/10/2022 07:45, Aki Tuomi wrote:
> 
>> On 04/10/2022 19:07 EEST Simon <sp12 at 31337.it> wrote:
>>
>>
>> I would like to authenticate users that use the PLAIN mechanism against an oauth2 idp (in this case it's an Azure AD B2C).
>>   I configured dovecot.conf with
>>   
> 
> <snip/>
> 
>>   
>>   
>>   So, why does dovecot say "No username returned"? The username is there! Do I have to configure something else?
> 
> Hi!
> 
> Does it work if you set introspection_mode=local?
> 
> Aki


Yes that works! Thanks for the tip.
I wrote everything down here for the next poor soul who needs to do 
this: https://31337.it/dovecot-b2c-oauth/

Regards,
Simon