Outlook seized a backup PST

QT-Pro

Junior Member
Local time
2:18 AM
Posts
7
Location
France
Thread starter
I'm running Office 365 Home which I migrated to from Office 2016 Professional. Being paranoid about potential data loss, I have always kept a backup of my Outlook data files on an external HDD. My main data file is named Outlook1 and in Outlook 365 it appears twice. Until a couple of days ago, I could never understand how it was that it was displayed in Outlook twice. One is at the top while the other comes 5th (last) in the list of mail accounts.

At first, I noticed that newly received mails were being automatically delivered to the copy at the bottom of the tree so I created rules so that all future mails from those senders would be delivered to the data file at the top of the tree. And then I noticed the activity light on the backup HDD flashing each time I received mail. Sure enough, checking the file properties shows it is the backup file. I have no idea how Outlook managed to seize the backup and include it in the program but the issue I have now is that the 2 files are not the same which means that essentially I have no backup.

It is easy to delete the backup from within Outlook but, as the mail contents are not the same, I need to merge them into one which will remain. Theoretically I can import one to the other asking Outlook to ignore duplicates but the last time I attempted that it corrupted the file so I'm nervous to repeat that experience.

Suggestions would be welcomed, please...
 

My Computer

System One

  • Operating System
    Windows 10 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Alienware Area 51m R2
    CPU
    Intel(R) Core(TM) i9-10900K CPU @ 3.70GHz
    Memory
    32.0 GB - DDR4 3200MHz
    Graphics Card(s)
    NVIDIA® GeForce® RTX 2080 SUPER™, 8Go GDDR6
    Monitor(s) Displays
    17,3" UHD (3840x2160) 60Hz, 25ms
    Hard Drives
    2TB (2x 1TB PCIe M.2 SSD) RAID 0 [Boot] + 2TB (2x 1TB PCIe M.2 SSD) Non-Raid [Storage]
    PSU
    1x 240W + 1x 330W

johngalt

Well-known member
WQ Insider
Member
VIP
Local time
8:18 PM
Posts
620
Location
3rd Rock
First of all, are you accessing POP accounts? Or just IMAP and Exchange based accounts? If you're not accessing POP-based accounts, and you don't have Exchange server set to download your email locally and then delete off the server, it shouldn't matter as the email is actually residing on the servers. But, Outlook should be saving locally and letting you make a backup, which you should be doing outside of outlook to better restore-ability.

Simple flow would be to:

remove the one that is not being used by Outlook currently form Outlook, then shut down Outlook, then verify that the 'backup' is newer than ht existing .PST in its default location, then copy the original .PST to a new location, then copy the backup to a new location, then copy the backup to the default location for Outlook and replace the existing one, then start Outlook and make the one in the default location the one to save emails too again (removing your rules, if that is the only method you used to redirect them to the backup file), then verify that the correct .PST in the default location is actually the one being used for Outlook, and then shut down Outlook and start backing up the default location .PST to it's new location. Only after you've verified that everything is working the way it should will you be justified in deleting those copies that you made.

Some people may argue that making hte copies of hte copies is irrelevant - I say it is not - because if anything goes wrongly, you still have the ability tt revert to one of those copies as needed until you get this all worked out correctly.
 

My Computer

System One

  • Operating System
    Windows 10 Pro X64
    Computer type
    PC/Desktop
    Manufacturer/Model
    The Beast Model A (homebrew)
    CPU
    AMD Ryzen 9 3950X
    Motherboard
    MSI MEG X570 GODLIKE
    Memory
    4 * Corsair Vengeance 32 GB 3600 MHz
    Graphics Card(s)
    eVGA GeForce GTX 970 SSC ACX 2.0 (04G-P4-3979-KB)
    Sound Card
    Realtek® ALC1220 Codec
    Monitor(s) Displays
    2 * Lenovo LT2323pwA Widescreeen @ 1920*1080
    Hard Drives
    3x Sabrent Rocket PCIe Gen4 NVMe M.2 1 TB SSD (SB-ROCKET-NVMe4-1TB)
    SanDisk Ultra SDSSDHII-960G-G25 960 GB SATA III SSD
    Crucial MX100 CT256MX100SSD1 256GB SATA III SSD
    2 * Seagate Barracuda 7200.12 ST31000528AS 1TB 7200 RPM (Old storage)
    PSU
    PC Power & Cooling’s Silencer Series 1050 Watt, 80 Plus Platinum
    Case
    Fractal Design Define 7 XL Dark ATX Full Tower Case
    Cooling
    NZXT KRAKEN Z73 73.11 CFM Liquid CPU Cooler + Air (3 * 140mm fans from case)
    Keyboard
    SteelSeries Apex Pro Wired Gaming Keyboard
    Mouse
    Logitech MX Master 3 Wireless Laser Mouse(shared)
    Internet Speed
    AT&T Lightspeed Gigabit duplex
    Browser
    Nightly|Chrome|Canary|Edge+ (Chromium) (in all 4 flavors)
    Antivirus
    Windows Defender + MB 4
Top