An employee in Reynosa needs an updated production schedule. Your accounting team in McAllen needs an invoice. A manager traveling between Brownsville and Matamoros needs to approve a purchase.
These are ordinary work requests for a border business. But when each location uses different accounts, devices, and communication tools, everyday tasks can expose sensitive information or slow down operations.
The scale of that collaboration is significant. According to the Texas Comptroller, the Port of Hidalgo handled approximately $46.4 billion in trade during 2024. Behind those shipments are teams exchanging orders, financial records, schedules, and customer information.
Operating across the border means coordinating people, technology, and privacy requirements in two countries. A clear approach to account access, file sharing, and communication helps both locations work together securely.
Start With Who Can Access What
Before choosing new software, identify who needs access to each business system.
Your warehouse team may need shipping documents without access to payroll. An outside accountant may need financial reports without permission to change payment details. A supplier may need one project folder rather than your entire shared drive.
This approach is called least privilege: give each person the access required for their work and review it when their responsibilities change.
Every employee should have an individual business account. Shared logins make it difficult to identify who changed a file, approved a transaction, or downloaded information. They also complicate offboarding because changing one password can disrupt several people.
Use a centrally managed identity system where possible. Your IT team should be able to review accounts, enforce security settings, and remove access across both locations without tracking down separate administrators.
VPN or Zero Trust: Choose Access That Fits the Job
A virtual private network, or VPN, creates an encrypted connection to a business network. It can support access to applications hosted inside an office.
However, a VPN configured with broad permissions can give users more network access than their work requires. Proper configuration and network separation matter.
Zero Trust Network Access, commonly called ZTNA, takes a more focused approach. Access decisions consider the user, device, and requested resource. NIST explains that zero trust does not automatically trust an account or device simply because of its location or ownership.
For example, a contractor could receive access to a production application without receiving general access to the office network.
ZTNA is worth evaluating when employees and partners connect from different locations or use devices your company does not manage. It does not make an unsecured device safe, and older applications may require a different arrangement.
The decision should follow your applications and workflows. Ask your IT provider to explain exactly what a user can reach after signing in.
Whichever approach you use, establish these basics:
- Require multifactor authentication for business accounts wherever supported.
- Use individual accounts and role-based permissions.
- Require updates, screen locks, and appropriate device protection.
- Review unusual sign-ins and changes to access.
- Disable departing employees’ access when their employment ends.
Offboarding should include active sessions, shared links, business messaging groups, and company devices. Removing email access alone leaves gaps.
Share Controlled Links Instead of Loose Attachments
Emailing a spreadsheet creates another copy that your business may struggle to control. Forwarding it through a chat group creates more copies.
A controlled sharing link keeps the working document in a managed location. Employees can use the current version, and administrators can change permissions when access is no longer needed.
Prefer links restricted to named recipients. Microsoft documents sharing options that require access by specified people, along with view-only permissions and download restrictions where available.
Set viewing as the default unless editing is necessary. Use expiration dates, access reviews, and activity logs where the platform supports them. If password-protected links are appropriate, communicate the password separately.
Avoid assuming every platform offers every control. Features can depend on your subscription, administrator settings, and link type.
Also remember that view-only access cannot prevent someone from photographing a screen. Share only the information the recipient needs, even when technical controls are available.
Mexico’s Privacy Rules Make Shared Policies Important
When files contain information about identifiable people, cross-border sharing also raises privacy obligations.
Mexico’s Federal Law on Protection of Personal Data Held by Private Parties, known as the LFPDPPP, addresses transfers to domestic and foreign third parties. Article 35 requires communicating the privacy notice and applicable purposes to the recipient, who assumes corresponding obligations.
Article 36 includes a consent exception for certain transfers within a corporate group, including qualifying entities operating under the same internal processes and policies.
That exception is not blanket permission for every transfer between business partners. A supplier, independent contractor, or separately owned company does not automatically qualify. Other privacy and security duties still apply.
Have qualified counsel confirm how the rules apply to your entities and data flows. Support that review with written policies covering authorized uses, access, retention, incident reporting, and employee responsibilities.
Make those policies available in the languages your teams use. Both locations should understand and follow the same documented expectations.
Address the WhatsApp Your Team Already Uses
If employees already coordinate through WhatsApp, a policy that ignores it will miss how work actually happens.
A 2026 survey by Ozaru and Púrpura AI, reported by El Economista, found that 76% of surveyed frontline workers used WhatsApp to coordinate work. The report also stated that at least 80% were unwilling to install company applications on personal devices because they feared monitoring. These are findings from that survey, rather than established rates for every Mexican workplace.
The practical response is to define clear boundaries and provide usable alternatives.
Where company policy permits WhatsApp, limit it to approved, low-sensitivity coordination. A message saying “Please review the updated schedule in the company portal” carries less information than attaching a spreadsheet containing employee details.
Specify what must stay in company-managed systems:
- Passwords, authentication codes, and recovery credentials.
- Payroll, banking details, and identity documents.
- Sensitive customer or employee records.
- Confidential contracts, pricing, and financial reports.
- Payment approvals and changes to vendor banking information.
Give employees a straightforward route for sharing those materials securely. If the approved process is confusing or unreliable, workarounds become more likely.
Respect Personal Phones and Explain Device Controls
Employees should understand what company software can see and control.
Before enrolling a personal phone in a management system, explain what information administrators collect, what they cannot access, and whether they can remove business data or erase the device.
Where suitable, use a separate managed work area or provide a company-owned device. Avoid making employees guess whether workplace security tools can inspect personal photos or messages.
Train managers alongside frontline staff. A policy loses credibility when supervisors continue requesting sensitive documents through personal chats.
Use examples from actual workflows, and provide instructions in English and Spanish where needed. Employees should know which tool to use, how to report a problem, and whom to contact for help.
Test One Workflow From Start to Finish
Begin with a task that crosses the border regularly, such as sharing an order, approving an invoice, or updating a shipment.
Check who can open the information, whether the recipient needs editing rights, what happens on a personal device, and how access is removed afterward. Test the process from both locations.
Then assign responsibility for account management, sharing permissions, employee training, and incident response. A shared system needs clear ownership.
Your team should be able to collaborate without passing around passwords or losing control of important files. Contact Total Tech to review how your U.S. and Mexico locations connect, share information, and manage access.