X-OWA-Error

Question

UTC Date: 2025-09-22T11:18:41.756Z
Client Id: Removed PII
Session Id:Removed PII
Client Version: 20250911063.06
BootResult: configuration
Back Filled Errors: Unhandled Rejection: Error: 500:undefined|undefined:undefined
err: Microsoft.Exchange.Data.Storage.TenantAccessBlockedException
esrc: StartupData
et: ServerError
estack: Error: 500
    at Object.w [as createStatusErrorMessage] (https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.fc02d13f.js:1:1039)
    at https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.fc02d13f.js:1:170296
st: 500
ehk: X-OWA-Error
efe: LO2P265CA0209
ewsver: 15.20.9137.19
emsg: TenantAccessBlockedError

Answer 1

Hi John,

That payload means OWA is failing on the server side with TenantAccessBlockedError, which Exchange Online throws when the entire Microsoft 365 tenant is blocked. It is not a browser or device issue, so local troubleshooting will not help. The fix is to remove the tenant block in the Microsoft 365 admin center.

Sign in as a Global admin or Billing admin at Microsoft Admin Center, then go to Billing > Bills and payments to clear any overdue balance if one is shown. Next open Billing > Your products, select the Microsoft 365 or Exchange Online subscription, and if you see Suspended or Disabled choose Reactivate subscription and complete the reactivation flow, including updating the payment method if requested.

When the subscription shows Active again, sign out of all Microsoft 365 sessions, close the browser, reopen it, and try Outlook on the web once more.

If you do not have admin rights, share this with your Microsoft 365 administrator because only they can lift a tenant block.

If OWA still shows X-OWA-Error after reactivation, tell me exactly what status you see for the subscription in Billing > Your products and I will guide you from there.