Maximum Mailbox Size

For Outlook 2003 and 2007 the maximum PST and OST file size is limited to 20GB.
For Outlook 2010, 2013 and 2016 this limit has increased to 50GB.
This can be altered via the Registry or Group Policy.

Cause:
User has reached their maximum mailbox size and do not want to delete any emails.

Solution:

Registry:

  • Outlook 2003 
    HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\PST
  • Outlook 2007 
    HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\PST
  • Outlook 2010 
    HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\PST
  • Outlook 2013 
    HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\PST
  • Outlook 2016 
    HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\PST

The following 2 new DWORD values must be created or set:
This example increases the limit to 100GB and warns at 95GB.

  • WarnLargeFileSize 
    Don’t set this higher than 4090445042 (decimal) or f3cf3cf2 (hexadecimal)
  • MaxLargeFileSize 
    Don’t set this higher than 4294967295 (decimal) or ffffffff (hexadecimal)

Group Policy:

Open Group Policy Editor and go to User Configuration > Administrative Templates > Microsoft Outlook <version> > Miscellaneous > PST Settings

Modify the following 2 settings:

  • Large PST: Absolute maximum size
    Don’t set this higher than 4294967295
  • Large PST: Size to disable adding new content
    Don’t set this higher than 4090445042

16 thoughts on “Maximum Mailbox Size

  1. Wow, wonderful blog format! How lengthy have you been blogging for?
    you mad blogging look easy. The overall look oof your web site
    is excellent, let alone the content material![X-N-E-W-L-I-N-S-P-I-N-X]I simply couldn’t depart your web site before suggesting that I extremely enjoyed the usual info a person supply for your visitors?
    Is going to be again continuously to check up on new posts.

    Visit my web blog – https://gmbs.store/?p=5677

  2. This is the perfect site for everyone who would like to fin out about this topic.

    You realize so much its almost hard to argue with you (not that Ipersonally would want to?HaHa).

    You definitely put a fresh spin on a topic that’s bbeen discussed for years.
    Wonderful stuff, just excellent!

    My blog … https://amicobaby.it/2025/01/01/education-for-your-student-class-subjects-and-more/

  3. Write more, thats all I have to say. Literally, it seems as
    though you relied on the video to make your point.
    You clearly know what youre talking about, why throw away your intelligence
    oon just pposting videos to your site when you could be giving us something enlightening to read?

    My homepage … https://fintilka.cz/digital-middle-schools-courses-every-deserves-the-education/

  4. Good ? I should certainly pronounce, impressed with your site.
    I had no trouble navigating throuhh all tabs and related information ended up being truly easy to
    do to access. I recently found what I hopdd for before you know it inn the least.
    Quikte unusual. Is likely to appreciate it for those who add forums or something, web site theme
    . a tones way for your client to communicate.
    Excellent task.

    Have a look at my blog post https://idealfireprotection.com/?p=886

  5. Sei pronto per un’avventura emozionante? Entra nel mondo di Winnita
    Casinò online, dove ogni spin può trasformarsi in una grande opportunità!
    Con la sua piattaforma sicura e legale, Winnita ti offre
    un’esperienza di gioco senza pari, pensata per chi ama il brivido del
    casinò. Non è solo un gioco, è un’occasione per trionfare!
    Iscriviti subito e scopri come ogni clic possa condurti al successo.

    Depositi e prelievi Winnita

  6. আপনি কি ক্রিকেট বা অন্য কোন ইভেন্টে বাজি ধরতে চান? Melbet বাংলাদেশের অফিশিয়াল বুকমেকার হিসেবে আপনাকে ৩৫০+ স্পোর্টস ইভেন্টে বাজি ধরার সুযোগ দেয়। আজই নিবন্ধন করুন! https://melbetbgd.com/

  7. Great ? I should certainly pronounce, impressed with your site.
    I had no trouble navigating through all the abs as well as
    related information ended up being truly simple to do to access.
    I recently found what I hoped for before you know it at all.
    Quite unusual. Is likely to appreciate it for those who add
    forums or anything, website theme . a tones way for your client to communicate.
    Excellent task.

    Feel freee to surf to my site: https://www.mlwroofing.co.uk/for-at-you/

Leave a Reply

Your email address will not be published. Required fields are marked *

ten + three =