# Mailbox Existence If a recently deleted user account's mailbox is not visible in the Exchange Admin Center (EAC), it does not necessarily mean that the user never had access to Office 365. Once license is removed mailbox will not appear in EAC, when license is removed, mailbox disconnects from the AD or Azure AD object - by history logs if present we can see if license was every assigned, than we can say it had access before to O365 or not ### Below scenarios can be there #### 1. **Mailbox Never Existed** * If the user account never had an Exchange Online license assigned, the user would not have an associated mailbox in Office 365. #### 2. **Mailbox Was Deleted** * If a user had a mailbox but it was deleted (either through account deletion or license removal), it might not appear in the EAC. Mailboxes are retained for a certain period after deletion (30 days by default for Office 365). During this period, the mailbox would appear under *"Deleted Mailboxes"* in EAC. #### 3. **Hidden from EAC View (rare situation)** * The mailbox could be hidden from the address list (using the `HiddenFromAddressListsEnabled` attribute) or not visible in EAC due to permissions or sync issues. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.jianny.net/work/o365/mailbox-existence.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.