Choosing a Dynamics 365 implementation partner is one of those decisions that gets far less scrutiny than it deserves. Businesses will spend weeks comparing licensing tiers and modules, then pick the partner based on a slick demo and a proposal that looks roughly the same price as the other two. Eighteen months later I get a call asking why the system does not do what everyone thought it would.
I have sat on both sides of this. I have been the technical architect brought in by a partner to deliver a project properly, and I have been the person a client hires afterwards to work out what went wrong and how much it will cost to fix. The pattern is nearly always the same. The partner was chosen on price and personality, not on evidence they could actually deliver.
Why the partner matters more than the platform
Dynamics 365 is a genuinely capable platform. Sales, Customer Service, Field Service, Finance, they all do what they say on the tin, and the Power Platform underneath gives you room to extend things sensibly. None of that protects you from a partner who does not understand your business, does not have the technical depth to configure it properly, or simply does not have the bench strength to staff your project once the contract is signed.
The platform is the same wherever you buy it. The partner is not. Two organisations can implement the exact same set of modules and end up with completely different outcomes, one a system people actually use, the other a expensive database nobody trusts. That gap is almost entirely down to who did the work and how they went about it.
The demo is not the deal
Every partner can put on a good demo. A demo is a controlled environment with clean data and a script written specifically to make the platform look effortless. It tells you almost nothing about how that partner behaves when your data is messy, your requirements change halfway through, or a go live date starts slipping.
Ask instead to speak to a client whose project finished more than a year ago, not one still in the honeymoon period straight after go live. A partner who is confident in their work will happily connect you. A partner who only offers references from projects that went live last month is telling you something, even if they do not mean to.
Questions that actually tell you something
Ask who specifically will be on your project, not which company logo is on the proposal. Named individuals with relevant experience matter far more than the size of the partner's overall Dynamics 365 practice. I have seen small partners outperform household names because the two or three people actually doing the work were simply better at their jobs.
Ask how they handle scope creep and change requests. Every project drifts from its original requirements once real users get involved. A partner with a clear, fair process for managing that is telling you they have done this before. A partner who insists everything will go exactly to plan is either inexperienced or not being straight with you.
Ask about their approach to data migration and security roles
These two areas are where I see the most expensive failures, and they rarely get proper attention during the sales process. Ask directly how the partner approaches data migration and how they design security roles. A partner with a considered answer to both has clearly been through the pain before. A partner who waves the question away as "standard configuration" has not.
Also ask what their go live support actually looks like in practice, not what the statement of work says. The first fortnight after go live is when a system either beds in or starts collecting a backlog of resentment. If the partner cannot describe concretely who is available and how quickly they respond during that period, treat it as a gap you will be filling yourself.
Red flags I see again and again
A quote that is significantly cheaper than everyone else's for the same scope is the single biggest red flag. Someone is absorbing that gap, and it is usually either the quality of the people on your project or the amount of time genuinely spent on discovery and testing. Cheap Dynamics 365 projects tend to become expensive Dynamics 365 rescue projects.
Watch for partners who push you towards out of the box configuration for everything, even where your business genuinely needs something different. It is a reasonable starting position, but if every one of your requirements gets answered with "you should just change your process to match the platform," that is often a lack of technical depth talking rather than good advice. Sometimes the platform should bend to the business, not the other way round.
Be wary too of a partner who cannot clearly explain their testing approach. I have written before about the most expensive mistakes I see on real projects, and a rushed or non existent testing phase sits near the top of that list every time. If testing is described in one vague sentence in the proposal, expect it to get squeezed when the timeline slips.
Fixed price versus time and materials
Fixed price contracts feel safer on paper because the number cannot move. In practice they push partners towards defending scope rather than delivering the right outcome, because every extra hour comes straight out of their margin. Time and materials feels riskier because the number can grow, but it tends to produce more honest conversations about what the project actually needs.
Neither approach is automatically wrong. What matters is that you go in with your eyes open about the incentive it creates, and that you have a named individual on your side, whether internal or an independent architect, whose job is to hold the partner to account regardless of the commercial model.
What good looks like after go live
A good implementation partner does not disappear the moment the system goes live. They should have a clear view of what happens in the weeks and months afterwards, including how user adoption will be measured and supported, not just whether the system technically works.
They should also be upfront about what they do not do well. Every partner has gaps, whether that is deep Power BI reporting, complex integration work, or specific industry knowledge. A partner who claims to be brilliant at literally everything is either lying or has not thought hard enough about their own limitations, and neither is a good sign for how they will handle your project when it gets difficult.
If you are choosing a partner right now, or you have already chosen one and want an independent view before things go further, that kind of second opinion is exactly the work I do as a Dynamics 365 Technical Architect. I would rather tell you something uncomfortable before you sign than be the person cleaning it up in two years.
