A Microsoft file hosting and synchronization service.
Hi Ulliana Igorevna Vasilieva
Thank you for posting question to Microsoft Q&A Forum.
I'm very sorry to hear that you are looking for this lost document from the old university account. However, as this is peer-to-peer support forum where I am moderator who does not have access in internal system to asssist you with recovery.
As Q&A Assist mentioned above, only your university's IT admin could help you by using Content Search. Details about it could be found at this link: https://techcommunity.microsoft.com/blog/microsoft-security-blog/getting-started-with-the-new-purview-content-search/4405757
If your account has been disabled for a long time after graduation - that could result in unfortunate result. Please check with them whether they disabled/deleted your account.
I hope this information is helpful.
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