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Large mailbox sizes, unstable network connections, and abrupt shutdowns are the leading causes of OST corruption. If Outlook reconnects successfully, the OST issue was likely caused by temporary disconnection from Office 365 servers. Microsoft provides a built-in tool called SCANPST.EXE to scan and repair minor OST corruption.

Step-by-Step Guide to Repair Outlook OST File in Office 365

On top of that, spending money on a mailbox repair is a waste. If you are not a professional and you repair it by mounting duct tape around it, it still can remain broken from the inside. But, to make it look brand new and strong from the inside, you need a tried and tested DIY hack.

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If any top needs to be removed, ensure the bottom of the mailbox aperture is 41 to 45 inches (100 to 110 cm) below the ground. Check your national mail service’s website for mailbox guidelines if you live somewhere other than the United States. Additionally, if your mailbox is made of iron or steel, you will require extra help and professional tools. You’ll need to remove the post and replace it if it wobbles.

Office 365 Activation Failed — Error 0xC004F074 (2025 Fix)

If you know the manufacturer of your mailbox, you can buy a bracket made specifically for it.But knowing the process on how slow my local state government takes to fix things, it could be a long time.If the OST works properly, disable unnecessary add-ins from File → Options → Add-ins.If your post is constructed of metal and there aren’t any screw holes at the top, you should replace it.Drive 34-inch (1.9 cm) screws through the pre-drilled holes in the mailbox to secure it to the wall.Tips by our experts will save your money and keep your mailboxes secure for the long run.

But the good thing is that you can easily repair the mailbox door at home. Here are a couple of Emergency mailbox repair hacks to help you. It's been like this for 4 weeks and USPS told us at the start the "problem will be fixed soon wait 3 weeks" 3 weeks have passed. You’ll see files ending with ".ost" — these store your cached mailbox data. Perhaps your mailbox door is all right, but the door might keep hanging.

Step1. Get Retrofit Doors For Metal Mailboxes

If your Outlook OST file isn’t syncing properly with Office 365, you’re not alone. Thousands of users face corrupted OST files, sync errors, and missing mailbox data after system updates or unexpected shutdowns. For this step of emergency mailbox repair, obtain a mounting bracket compatible with your mailbox. You’ll need to repair the mounting bracket if it’s deformed or Exchange connectivity diagnostic broken.

The bit should generally match the shaft diameter of the screws, which is less than the thread diameter. Yes — Outlook will re-sync mailbox data from the server once you relaunch the app, as long as you use an Exchange or Office 365 account. Align the holes in the bracket with the holes you pre-drilled in the post. To secure the bracket to the post, drive the one 34-inch (4.4) screw through the holes.

Look at the top of the mailbox and the bottom of the post. You’ll need to repair the metal bracket that connects if it’s broken. Screws connecting the post and mailbox may have splintered the wood at the top of the post. Smooth the top of the post with 40- to 60-grit sandpaper, if required. You may need to see off the damaged top if the damage is severe.

But remember that there are kinds of damages that you cannot repair on your own, for instance, holes, cuts, and tears in the mailbox. However, if the mailbox has become the victim of rust and bad weather, you can solve Office 365 mailbox sync delays repaint it. The paint will prevent the mailbox from getting rusted, but it won’t protect it from the damage that comes with rust.

Why does my OST file keep corrupting?

Also, if you still want Outlook stuck updating folders solution to be a handyman, you can buy brackets, mailboxes, address plaques, and other mailbox repair tools from our site. The first step for mailbox repair is to wiggle the post to test if it’s still standing stable. If it’s robust, then the mailbox isn’t damaged from the inside.