The Mixed Reality Forums here are no longer being used or maintained.
There are a few other places we would like to direct you to for support, both from Microsoft and from the community.
The first way we want to connect with you is our mixed reality developer program, which you can sign up for at https://aka.ms/IWantMR.
For technical questions, please use Stack Overflow, and tag your questions using either hololens or windows-mixed-reality.
If you want to join in discussions, please do so in the HoloDevelopers Slack, which you can join by going to https://aka.ms/holodevelopers, or in our Microsoft Tech Communities forums at https://techcommunity.microsoft.com/t5/mixed-reality/ct-p/MicrosoftMixedReality.
And always feel free to hit us up on Twitter @MxdRealityDev.
Best solution to upload OST to Office 365
The simplest and the best method to convert OST to Office 365 is a software. You can try MailsDaddy OST to Office 365 Migration Tool for fast and safe OST data conversion. The best part of using the tool is that it does not necessitate the use of Windows PowerShell for exporting OST data. It is a brilliant tool to export single or bulk OST files without any issue.
You also don't need to worry if you have the corrupted OST file. You can easily repair the damaged OST file and move to o365. It can support the highly damaged OST file and migrate to Exchange Online. It even supports orphaned, Exchange Server, IMAP or Hotmail OST files. The software also has the feature to export OST data into PST. Suitable for all versions of Windows and Outlook.
If you are looking for some reliable software then I suggest you download and use its Demo version.