I have a java spring boot application that I authenticate through our exchange servers. The from address included in the email is the same address associated with the authenticated user.
When I point the connection URL directly at one of the exchange servers it will authenticate and send email successfully. However when I point it at the (I think it's called a relay) [URL that points at either server] and then it starts giving me this error (Authentication failed; nested exception is javax.mail.AuthenticationFailedException: 535 5.7.3 Authentication unsuccessful)
At this point the user account is not included within any admin roles. HOWEVER, when I add the account to the "Organization Management" Admin Role which has the following assigned roles (below) it will authenticate and send emails. The final kicker is when I create a copy of that role and add the account as a member, it fails to authenticate. I all these things mentioned above were done while being logged into the domain administrator account with full access. I don't know where else to look or what else to try. Please help.
- Active Directory Permissions
- Address Lists
- Audit Logs
- Cmdlet Extension Agents
- Compliance Admin
- Data Loss Prevention
- Database Availability Groups
- Database Copies
- Databases
- Disaster Recovery
- Distribution Groups
- Edge Subscriptions
- E-Mail Address Policies
- Exchange Connectors
- Exchange Server Certificates
- Exchange Servers
- Exchange Virtual Directories
- Federated Sharing
- Information Rights Management
- Journaling
- Legal Hold
- Mail Enabled Public Folders
- Mail Recipient Creation
- Mail Recipients
- Mail Tips
- Mailbox Search
- Message Tracking
- Migration
- Monitoring
- Move Mailboxes
- Org Custom Apps
- Org Marketplace Apps
- Organization Client Access
- Organization Configuration
- Organization Transport Settings
- POP3 And IMAP4 Protocols
- Public Folder Replication
- Public Folders
- Receive Connectors
- Recipient Policies
- Remote and Accepted Domains
- Retention Management
- Role Management
- Security Admin
- Security Group Creation and Membership
- Security Reader
- Send Connectors
- Team Mailboxes
- Transport Agents
- Transport Hygiene
- Transport Queues
- Transport Rules
- UM Mailboxes
- UM Prompts
- Unified Messaging
- User Options
- View-Only Audit Logs
- View-Only Configuration
- View-Only Recipients
- WorkloadManagement
