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Changing the username to something that already exists shows a 'Something went wrong' message in the UI · Issue #5177 · postmanlabs/postman-app-support · GitHub
![KB4292: Veeam Backup for Microsoft 365 Restore Portal Error: "The server has rejected the client credentials" KB4292: Veeam Backup for Microsoft 365 Restore Portal Error: "The server has rejected the client credentials"](https://cdn.veeam.com/content/veeam/en/knowledge-base/kb4292/jcr:content/content-parsys/section-main/section-with-background-content/section-sections/section-with-background-content/section_with_backgro_cause/section-with-background-content/image/file.web.ntfile.png/2CertSelected.png)
KB4292: Veeam Backup for Microsoft 365 Restore Portal Error: "The server has rejected the client credentials"
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