How to switch IT support provider without downtime

Short answer. Changing IT provider takes two to four weeks and, if it is done in the right order, nobody in the business notices beyond a new name to ring. Your email, files and applications stay where they are; what moves is administration. The three things that go wrong are giving notice before checking what you own, treating the handover as a chat rather than a checklist, and leaving credential changes to the last day.

Businesses put this off for years because it feels like moving house. It is closer to changing accountants. Here is the plan I run when someone moves to me from another provider.

Week one: read the contract, check what you own

Before you give notice, two pieces of homework.

The contract. Find the notice period, the end date, and the renewal clause. Some agreements roll for another year or three if notice misses a specific window. Note any offboarding charges and anything about “return of materials” or documentation.

Ownership. This is the one that matters. Make a list and, for each item, write down whose name it is in and whether you hold the master login:

• Your domain name (the registrar account)
• DNS hosting
• The Microsoft 365 tenant and its global administrator account
• Email security or spam filtering services
• Backup services and their encryption keys
• The firewall, Wi-Fi controller and any remote-monitoring agent
• Line-of-business software accounts and licences
• Any hardware leases

If anything on that list is registered in the provider’s name, or you have no admin credentials of your own, that is your first job. Ask for it to be transferred to the business now, while you are still a paying customer and before you say the word “notice”. A good provider does this without fuss. A reluctant one has told you what the next few weeks will be like.

Week two: choose the new provider and agree the handover

Pick the new provider before giving notice, and give them the ownership list above. Their onboarding should produce a written handover schedule: what happens on which day, who does it, and what “done” looks like for each line.

Ask the outgoing provider for a handover pack. At minimum:

• Network documentation: IP ranges, VLANs, firewall rules, Wi-Fi details
• A list of every device and its login method
• All administrator credentials, delivered securely, not in an email
• Licence details: what, how many, where billed, renewal dates
• Backup configuration and how to restore
• Open tickets and known problems
• Any scripts, automations or scheduled tasks they set up

You may not get all of it. You will get more by asking for a list than by asking “can you do a handover”.

Then give notice in writing, dated, and keep the acknowledgement.

Week three: parallel running

If the contract allows, this week both providers have access. The new one:

1. Creates their own global admin account in your tenant and enables MFA on it.
2. Installs their monitoring agent alongside the old one.
3. Verifies backups by doing a test restore, not by reading a dashboard.
4. Documents everything into a system you can log into.
5. Meets the staff, or at least emails them, so the new name is familiar before it is needed.

Licences move now if they are moving. The new reseller’s licences go live before the old ones are cancelled, never the other way round, or mailboxes stop working.

Nothing is switched off yet.

Cutover: a single afternoon

Pick a quiet afternoon. In order:

• Remove the old provider’s remote-monitoring agent from every device.
• Remove or disable their administrator accounts in Microsoft 365, the firewall, DNS and every service on the ownership list.
• Change any shared passwords they knew.
• Update the “who to call” note on the staff intranet, the sticker on the printer, wherever it lives.
• Confirm backups are still running under the new configuration.

Then leave. If the preparation was done, the afternoon is an anticlimax, which is the point.

The first 30 days

Expect a few weeks of small tickets as the new provider learns your quirks: the printer that needs the old driver, the person who works from a boat. That is normal. What you should also see inside the first month is a written picture of your IT you did not have before, and the first honest list of things that should change.

When it is not worth switching

A word of balance. If your current provider answers the phone, knows your setup and the price is fair, a slightly cheaper quote is not a reason to move. Switching costs time and attention even when it goes perfectly. Move for a service problem, an ownership problem, or a real gap between what you need and what you get.

If you are weighing it up, the first call with me is exactly that conversation. I will tell you if you are better off staying put; it has happened. How engagements work sets out the shapes on offer, and a 30-minute call is where the ownership list gets checked.