Office365 NTLM authentication

Question

Can I authenticate credentials with Office365 based on NTLMv2.

Microsoft describes on Authentication and EWS in Exchange that clients can authenticate with Exchange based on NTLM, but My program connects to outlook.office365.com to authenticate based on NTLM Office365 replies Basic-Authentication.

Does anyone know what's the problem? Or how can authenticate Office365 with NTLM authentication technique?

Right at the top of the linked page, it says: " NTLM (Exchange on-premises only) " — mfinni, Jan 17 '19 at 20:10

score 5 · Answer 1 · answered Jan 17 '19 at 20:03

5

No, you cannot. O365 uses modern claims based auth, so WS* and SAML. Possibly OAUTH or OPENID too.

If you have on-prem AD, ADFS, you can probably auth to that, and get a token to pass to O365.

answered Jan 17 '19 at 20:03

markgamache

195
4

score 1 · Answer 2 · answered Jan 18 '19 at 02:12

1

According the article you provided, it seems NTLM authentication is only available for Exchange on-premises servers.

answered Jan 18 '19 at 02:12

Shaw Lu

339
1
4

Office365 NTLM authentication

2 Answers2