The server and port settings are incorrect. The user's mail server must either have SSL/TLS enabled, or have the capability to upgrade to a secure connection using STARTTLS. We require secure connections to the mail server to sync and send mail. Nylas uses IMAP and SMTP to sync and send mail, so if IMAP is not enabled on the mail server we can't support it. If the issue persists, ask the user to log out of all Office365 accounts and then try again.Īlternatively, ask the user to try authenticating from an Incognito or Private browser session. They must authenticate with the main account. Make sure the user is not attempting to log into an alias. When using OAuth, the email address used to authenticate must remain the same throughout the process.Įnsure the user is not entering or selecting a different email address on Office 365 than originally entered on Nylas. Status 403: Office 365 returned us an email address different from the one that started the authentication process. When authenticating with Nylas using Office365 OAuth, users may sometimes receive the following error after authentication: Nylas was unable to connect using the server settings that were provided. If a user's mail server is behind a VPN or firewall or has strict MDM policies in place, we may not be able to support connecting their account. The user should reach out to their mail administrator and ask for the correct connection settings so they can manually connect. Nylas was unable to determine the correct connection settings using Autodiscovery automatically. Reach out to the mail provider for more information Login failed due to an unknown mail server error The mail server experienced a temporary error.Ĭonnection blocked due to excessive usage Nylas currently cannot authenticate an account through IMAP if the account contains characters that are not ASCII character encoding. You can review the expiration dates for tokens in Configurable token lifetimes in the Microsoft identity platform. When a token expires, Nylas needs a new token to connect to the email server. Microsoft identity platform lets administrators set token access. You might have an invalid credentials error for Microsoft users that is not related to a password change or expiration.

Invalid credentials Not Related to Password Changes If a user's mail server is behind a VPN or firewall or has strict MDM policies in place, connection to Nylas may not be possible. Make sure mobile device provisioning is enabled and that ActiveSync connections are allowed: see Suggested Office 365 Settings.Ĭheck that Nylas devices aren't quarantined or blocked: see Checking for quarantined EAS devices. Then, try logging in again by adding the settings under advanced settings using this guide.

Older devices will need to have an app-specific password.Īsk the email administrator what server and the port information should be used to connect. Mobile devices aren't provisioned and ActiveSync connections are not allowed. Basically we do not have full view/oversight of the connected inbox, just enough to send emails and see the replies to said emails and create folders.Ī user receives an invalid password error even if they type the correct password in.Īutodiscovery could be trying to login to the wrong server.

Nylas mail looking for messages status