Change OneDrive iPhone App back to be able to sync with multiple accounts in a tenant.
OneDrive has been commonly deployed and used for group company as 1 tenant.
Since people can belong to multiple companies in the group company, end users have multiple accounts to control their security to keep up with the rapid organizational changes (6.8 can do).
However recent OneDrive iPhone app update (6.14 or earlier) makes this app unable to sync with multiple accounts. So they can only use 1 account to access from mobile phone.