Outlook not opening with following error message

Question

I am getting the following error and unable to open my Outlook inbox:

UTC Date: 2026-02-17T03:17:00.661Z
Client Id: EDB7CA5BF25E4395B81D902B1D48D5B0
Session Id: b131f6fd-1897-4242-b265-81439fe43e66
Client Version: 20260206002.09
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.a44c7b4f.js:2:8650)
    at https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.a44c7b4f.js:2:41358
st: 500
ehk: X-OWA-Error
efe: BN0PR04CA0119
ewsver: 15.20.9611.16
emsg: TenantAccessBlockedError

Answer 1

Hi Laura,

I see the Tenant is blocked. Is it an Exchange account?

I’m eager to hear back and work together to find a solution.