Statement: Microsoft basic authentication deprecation in Exchange Online

Ricoh has been made aware of Microsoft's decision to discontinue support for basic authentication for sending emails using the SMTP protocol in Exchange Online (also referred to as Office365 or Microsoft 365) as of September 2025. This decision follows on from an earlier discontinuation of basic authentication for the POP3S and IMAPS protocol for receiving emails (see Ricoh's statement here).

As part of this transition process, Ricoh will add support for OAuth when using SMTP connections to Office365 for most models that were released after 2017. This overview will be updated as soon as the release dates have been finalised.

Many Ricoh devices already support Automatic Remote Firmware Update (ARFU), so it is very possible that OAuth support for SMTP will be available on your Ricoh device(s) automatically. Additionally, users can also update their Ricoh devices by using the Ricoh Firmware Update Tool (RFUT) which can be found here. 

Customers who are using Ricoh or 3rd party solutions like StreamLine NX should already be able to use OAuth for SMTP.

Our aim is to support all our customers through this transition and if you have any further questions related to OAuth for SMTP for Office365 please contact your local Ricoh representative who will be able to assist you.

Information from 3rd parties: Microsoft OAuth knowledge article (here) Microsoft knowledge article on different connection methods for SMTP (here) OAuth article on Wikipedia (here)