The correct answer is to add the product as a work order service line item in the mobile app. This is because the Dynamics 365 Field Service Mobile app is designed to let technicians add parts directly to a work order as line items, which automatically updates inventory in real time if the product is inventory-tracked. On the MB-910 exam, this scenario tests your understanding of the mobile app’s ability to handle on-site service adjustments without requiring a separate inventory adjustment or a return to the office. A common trap is confusing inventory adjustments with work order line items—remember that inventory changes must be tied to the work order to maintain accurate records. The key distinction is that the technician updates the work order itself, not a separate inventory log. For a memory tip, think “line item equals live inventory” to recall that adding a service line item on mobile is the direct path to updating stock.
MB-910 Describe Dynamics 365 Field Service Practice Question
This MB-910 practice question tests your understanding of describe dynamics 365 field service. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A technician is on site and realizes the service requires a part that was not listed on the work order. How can the technician add the part and update inventory in real time?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add the product as a work order service line item in the mobile app.
Option C is correct because the Field Service Mobile app allows technicians to add line items (products/services) to a work order, which can update inventory if the product is tracked. Option A is wrong because the work order must be updated to reflect the part used. Option B is wrong because inventory adjustments are separate and should be tied to the work order. Option D is wrong because the customer should not be asked to add items.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Add the product as a work order service line item in the mobile app.
Why this is correct
The mobile app supports adding line items and updating inventory in real time.
Related concept
Static NAT maps one inside address to one outside address.
✗
Call the dispatcher to update the work order.
Why it's wrong here
The technician can update directly from the mobile app.
✗
Ask the customer to add the part to the work order via the portal.
Why it's wrong here
The customer portal may not allow adding parts to active work orders.
✗
Record the part usage manually and adjust inventory later.
Why it's wrong here
Real-time update is possible and recommended.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related MB-910 NAT questions on configuration and troubleshooting.
Describe Dynamics 365 Field Service — This question tests Describe Dynamics 365 Field Service — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Add the product as a work order service line item in the mobile app. — Option C is correct because the Field Service Mobile app allows technicians to add line items (products/services) to a work order, which can update inventory if the product is tracked. Option A is wrong because the work order must be updated to reflect the part used. Option B is wrong because inventory adjustments are separate and should be tied to the work order. Option D is wrong because the customer should not be asked to add items.
What should I do if I get this MB-910 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related MB-910 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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