How to configure Personalize the OWA URL for Office 365 in Exchange 2010SP3 hybrid scenario ..???

I have configure  Exchange 2010 SP3 hybrid with office 365 , and if I migrated user mailbox from on-premise to office 365, when I login OWA, it will show  “Use the following link to open this mailbox with the best performance”, but click this link will redirect to office 365 and need input my Credential again,

we are only use dirsync for same sign on ,not using ADFS for single sign on.

our on premises exchange 2010 Sp3 server owa url name ...>>  can i use the same name for office 365 login portal...???
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Vasil Michev (MVP)Commented:
Just create a CNAME and point it to Or configure the on-prem OWA redirect as detailed here:
harisaboobakerAuthor Commented:
We have total 900 mailbox ,only plan to move 250 users to office 365 .rest of users are still reside in our on premises Exchange 2010 SP3 server.

Can i use same URL for accessing mail both end users (on premises and office 365 users ) with out entering sign in Credentials multiple times ...???

we are not using ADFS for single sign on. Only using  Dirsync tool.
Vasil Michev (MVP)Commented:
No, without AD FS you will not have SSO - users will have to enter credentials when accessing O365 resources.

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