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TonyRedmond's avatar
TonyRedmond
MVP
Dec 15, 2016

The default mailbox size for Exchange Online E3 and E5 users is increasing from 50GB to 100GB

Microsoft hasn’t said anything about increasing the default quota for Exchange Online mailboxes from the previous 50 GB limit, so it came as a surprise when the Office 365 Roadmap announced that an increase was on the way. The last change was from 25 GB to 50 GB in 2013. Maybe we will get 200 GB mailboxes in 2019?

 

https://www.petri.com/exchange-online-mailbox-quotas-swelling

office 365
  • Sean Boudreau's avatar
    Sean Boudreau
    Brass Contributor
    Dec 19, 2016

    Anyone know if Outlook OST can handle that much or if you need to be in Online mode?

    I knew 2016 could do 50GB... but i still tried to get my users to stay under 20GB like th older cleints required.

    • TonyRedmond's avatar
      TonyRedmond
      MVP
      Dec 19, 2016

      I doubt Outlook's OST can handle a fully-synchronized 100 GB mailbox. You will have to reduce the amount of data you synchronize or connect online. Even the fastest SSD will have trouble with an OST larger than 20 GB...

      • Colwill's avatar
        Colwill
        Copper Contributor
        Aug 09, 2019

        TonyRedmond 

        I have seen Outlook sometimes freezes due to load of emails and it also depends on emails sensitivity and complexity in handling large email files.

        I still have Outlook 2013 on my lattitude dell and it is working nicely with 4GB of emails these emails are backed up for 4 years.

        i have seen the issue with a person who had 7GB OST file, most of his emails has attached items, i then suggested him to split ost file move to Office 365.

         

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