{
  "is": "issue",
  "title": "Unexpected sender name on outbound email messages",
  "body": "\u003cp\u003e\u003cem\u003eIssue Resolved | 10:27pm Central\u003c/em\u003e - Microsoft reports that the issue is now resolved. The Atelic Technology Services Department appreciates your patience and understanding while working through this service outage. If the issue is still occurring, please contact the Technology Services Department. This will be the last update unless the issue recurs.\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eVendor Implementing Fix | 02:57pm Central\u003c/em\u003e - Microsoft has identified the root cause of the issue and is in process of implementing a fix. The Atelic Technology Services Department has not been able to validate this report but are monitoring further updates from Microsoft. End user disruption may occur for this issue.\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eVendor Investigating | 08:42am Central\u003c/em\u003e - Microsoft continues to investigate the issue and is confirming whether the update identified is causing impact and whether this can be safely reverted as a mitigation step. Microsoft reports that some users’ outbound email messages may display an unexpected sender name in Exchange Online. The Atelic Technology Services Department has not been able to validate this report but are monitoring further updates from Microsoft. End user disruption may occur for this issue.\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eVendor Investigating | 06:58am Central\u003c/em\u003e - Microsoft continues to investigate the issue and identified that a recent service update introduced new outbound mail behavior that caused Exchange Online to stop honoring the configured SimpleDisplayName in some outbound email scenarios, resulting in impact. Microsoft reports that some users’ outbound email messages may display an unexpected sender name in Exchange Online. The Atelic Technology Services Department has not been able to validate this report but are monitoring further updates from Microsoft. End user disruption may occur for this issue.\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eVendor Investigating | 04:34am Central\u003c/em\u003e - Microsoft continues to investigate the issue and revieweing message headers in parallel with reviewing recent code changes. Microsoft reports that some users’ outbound email messages may display an unexpected sender name in Exchange Online. The Atelic Technology Services Department has not been able to validate this report but are monitoring further updates from Microsoft. End user disruption may occur for this issue.\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eReport Received | 02:46am Central\u003c/em\u003e - We are investigating a potential issue that might affect the uptime of one of our services. Microsoft reports that some users’ outbound email messages may display an unexpected sender name in Exchange Online. The Atelic Technology Services Department has not been able to validate this report but are monitoring further updates from Microsoft. End user disruption may occur for this issue.\u003c/p\u003e\n",
  "createdAt": "2026-03-23 07:43:11.773 +0000 UTC",
  "lastMod": "2026-04-07 15:34:56 +0000 UTC",
  "permalink": "https://status.atelic.com/issues/2026-04-07-unexpected-sender-name-on-outbound-email-messages/",
  "severity": "disrupted",
  "resolved": true,
  "informational": false,
  "resolvedAt": "2026-03-24T03:27:11.775Z",
  "affected": ["Microsoft"],
  "filename": "2026-04-07-unexpected-sender-name-on-outbound-email-messages.md"
}