Zoho Data Migration

Yes, and it is the move we handle most often. What transfers cleanly is masters — customers, vendors, items — along with opening balances and open invoices and bills. What we usually advise against is forcing years of voucher-level history across: it is slow, it rarely reconciles perfectly, and it makes your new system worse from day one. The better pattern is to keep Tally read-only for prior years and start Zoho Books clean from an agreed opening date. One thing to expect: Tally organises around ledgers rather than customers, so the same buyer may exist under several ledger names and somebody at your end has to decide which are the same party.

No unique key. If the import mapping has no field that uniquely identifies a record — a customer code, a GSTIN, an email — then every row is treated as new, and a re-run doubles your data instead of updating it. It is the root cause of nearly every 'the import created hundreds of duplicates' call we take, and it is entirely preventable by deciding the key before the first load rather than after the third.

Usually not. Carrying everything feels like the safe option, but dead records make search slower, reports noisier and the new system's data quality worse on its first day. The useful question is not 'what can we move' but 'what will anyone actually query', and the honest answer is generally two to three years of transactional history plus all live masters. Older data stays accessible in the source system, which is cheaper than migrating it and safer than deleting it.

For a single-source move with clean data, one to two weeks running alongside configuration. Multi-source migrations, or ones where the source data needs significant de-duplication, run three to six weeks. The variable is almost never the technical load time — it is how long the decisions take: which duplicates are the same customer, what the unique key is, where the history cut-off sits. Projects that stall are stalled on those, not on the tooling.

No, because nothing is done destructively. The source system stays untouched and available throughout — we extract from it, we do not move out of it. Loads are run into a sandbox or restricted org first, at full volume, and reconciled against source totals before anything goes near the live environment. The old system is decommissioned on an agreed date after cutover, not during it.

Yes — from Google Workspace, Microsoft 365, or a hosting-panel mailbox. The mail, folders, contacts and calendars migrate reliably. The parts that catch people out are around the mail rather than in it: DNS cutover timing, aliases and forwards nobody has documented, and 'shared' mailboxes that turn out to be one employee's personal account with the password written down somewhere. We audit those before the switch rather than discovering them after it.

No, and it is worth being clear about this because it is often assumed. Migration moves records. Automation, reports, dashboards and the permission model have to be rebuilt as Zoho equivalents — that is implementation work rather than migration work, and it is scoped separately. The upside is that it is a good moment to ask which of those rules anyone still wants, because a surprising number of them exist only because nobody turned them off.

They can come across, and it needs to be an explicit decision rather than an assumption. Attached contracts, signed POs and photographs are frequently the actual reason a legacy system cannot simply be archived, and they carry their own volume, their own transfer time and their own cost. We size this during profiling so it is in the scope rather than discovered after the old system has been switched off.